Exhibit 99.1

Execution Version

WARRANT AGREEMENT

This WARRANT AGREEMENT dated as of January 14, 2010 (this “Warrant Agreement”) is between HYDROGENICS CORPORATION, a Canadian corporation (the “Corporation”), and MELLON INVESTOR SERVICES LLC, as warrant agent (the “Warrant Agent”).

WHEREAS, the Corporation desires to issue certain warrants described herein, which will initially entitle the holders thereof (the “Holders”) to purchase, in the aggregate, up to 12,500,000 common shares of the Corporation (“Common Shares”);

WHEREAS, the Warrants are being issued in connection with an offer of up to 12,500,000 units of the Corporation (the “Units”) at a price of US$0.40 per Unit. Each Unit consists of (i) one Common Share, (ii) 0.47871088 of one series A common share purchase warrant expiring on the date which is five years from the date of its issue (a “Series A Warrant”), and (iii) 0.52128912 of one series B common share purchase warrant expiring on the date which is five years, six months and one day from the date of its issue (a “Series B Warrant,” and together with the Series A Warrant, the “Warrants”);

WHEREAS, each whole Warrant will entitle the Holder to purchase one Common Share for US$0.52 per Common Share (subject to adjustment); and

WHEREAS, the Corporation further desires the Warrant Agent to act on behalf of the Corporation in connection with the issuance, transfer, exchange and exercise of the Warrants and other matters as provided herein and the Warrant Agent is willing to so act.

NOW, THEREFORE, each party agrees as follows for the benefit of the other party and for the equal and ratable benefit of the Holders of the Warrants:

ARTICLE I
DEFINITIONS AND RULES OF CONSTRUCTION

1.1 Definitions.

“Affiliate” shall mean with respect to any Person, any other Person directly or indirectly controlling, controlled by, or under common control with, such Person; for purposes of this definition, “control” shall mean the possession, directly or indirectly, of the power to direct or cause the direction of the management and policies of a Person, whether through the ownership of voting securities or otherwise.

“Board of Directors” or “Board” means the board of directors of the Corporation or any committee thereof duly authorized to act on behalf of such board.

“Business Day” means any day other than a Saturday, Sunday or other day on which commercial banks in the State of New York or the State of New Jersey, are authorized or required by law or executive order to close.

“Exercise Price” means an exercise price of US$0.52 per Common Share (subject to adjustment as provided in the Warrant Certificates).

“Holder” means the Person in whose name a Warrant is registered on the Warrant Registrar’s books.

“Officer” means the Chairman of the Board of Directors, the Chief Executive Officer, the Chief Financial Officer, the President, any Vice President, the Treasurer, the Secretary or any Assistant Secretary of the Corporation.

“Opinion of Counsel” means a written opinion from legal counsel. Such counsel may be an employee of or counsel to the Corporation and in any event must be reasonably acceptable to the Warrant Agent.

“Person” means any individual, corporation, limited liability company, limited liability partnership, partnership, trust, incorporated or unincorporated association, joint venture, joint stock company, government (or an agency or political subdivision thereof) or other entity of any kind.

“SEC” means the Securities and Exchange Commission.

“Uniform Commercial Code” means the Uniform Commercial Code as in effect in the State of New York.

“Warrant Agent” means Mellon Investor Services LLC or any successor person to Mellon Investor Services LLC under this Warrant Agreement.

“Warrant Certificates” mean the registered certificates issued by the Corporation under this Warrant Agreement representing the Warrants.

“Warrant Registrar” has the meaning set forth in Section 2.3.

1.2 Rules of Construction.

Unless the context otherwise requires:

(a) a defined term has the meaning assigned to it;

(b) an accounting term not otherwise defined has the meaning assigned to it in accordance with generally accepted accounting principles as in effect from time to time;

(d) “including” means including without limitation; and

(e) words in the singular include the plural and words in the plural include the singular.

ARTICLE II
WARRANT CERTIFICATES

2.1 Form and Dating.

Each Warrant shall initially be issued as part of the Units on the date hereof, which will be offered and issued by the Corporation pursuant to a prospectus supplement dated January 11, 2010 to the Corporation’s base shelf prospectus, which was contained in the Corporation’s registration statement on Form F-3 and declared effective by the SEC on December 31, 2009. In acting as the transfer agent for the Warrants, the Warrant Registrar shall be entitled to all the rights, privileges and immunities to which the Warrant Agent is entitled in performing such role pursuant to the terms of this Warrant Agreement. The Warrant Certificates for (i) Series A Warrants shall each be substantially in the form of Exhibit A attached hereto; and (ii) Series B Warrants shall each be substantially in the form of Exhibit B attached hereto. The Warrants may only be sold or transferred in accordance with this Warrant Agreement and the Warrant Certificates may have notations, legends or endorsements required by law, stock exchange rule, agreements to which the Corporation is subject, if any, or usage (but which do not affect the rights, duties or responsibilities of the Warrant Agent, and provided that any such notation, legend or endorsement is in a form acceptable to the Corporation). Each Warrant Certificate shall be dated as of the date of its countersignature.

2.2 Execution.

One Officer shall sign each Warrant Certificate for the Corporation by manual or facsimile signature. If an Officer whose signature is on a Warrant Certificate no longer holds that office at the time the Warrant Agent countersigns the Warrant Certificate, the Warrant Certificate shall be valid nevertheless. A Warrant shall not be valid until an authorized signatory of the Warrant Agent countersigns, by manual or facsimile signature, the Warrant Certificate. The signature shall be solely for the purpose of authenticating the Warrant Certificate and shall be conclusive evidence that the Warrant so countersigned has been duly authenticated and issued under this Warrant Agreement. The Warrant Agent shall countersign and make available for delivery upon a written order of the Corporation, signed by one Officer, a Warrant Certificate entitling the Holder thereof to purchase in the aggregate not more than that number of Common Shares upon due exercise of a Series A Warrant or Series B Warrant set forth opposite such Holder’s name under the relevant column on the Schedule of Holders, attached hereto as Schedule A, each subject to adjustment, as set forth in the Warrant Certificate. Collectively, the Holders of the Warrants issued in connection with the offer of the Units may purchase in the aggregate (i) up to 5,983,886 Common Shares upon due exercise of the Series A Warrants; and (ii) up to 6,516,114 Common Shares upon due exercise of the Series B Warrants, each subject to adjustment, as set forth in the Warrant Certificate. The Warrant Agent may appoint an agent reasonably acceptable to the Corporation to countersign the Warrants. Any such appointment shall be evidenced by an instrument signed by the Warrant Agent, a copy of which shall be furnished to the Corporation. Unless limited by the terms of such appointment, an agent may countersign Warrants whenever the Warrant Agent may do so. Each reference in this Warrant Agreement to countersigning by the Warrant Agent includes countersigning by such countersigning agent. An agent has the same rights as any Warrant Registrar or agent for service of notices and demands.

2.3 Warrant Registrar.

(a) The Corporation shall maintain an office or agency where Warrants may be presented for registration of transfer, exchange or exercise (the “Warrant Registrar”). The Warrant Registrar shall keep a register of the Warrants and of their transfer, exchange or exercise. The Corporation may have one or more co-registrars. The term Warrant Registrar includes any co-registrars. The Corporation appoints the Warrant Agent as Warrant Registrar in connection with the Warrants.

(b) The Corporation shall enter into an appropriate agency agreement with any Warrant Registrar who is not a party to this Warrant Agreement. The agreement shall implement the provisions of this Warrant Agreement that relate to such agent. The Corporation shall notify the Warrant Agent of the name and address of any such agent. If the Corporation fails to maintain a Warrant Registrar, the Warrant Agent shall act as such and shall be entitled to appropriate compensation pursuant to Section 3.5 hereof. The Corporation or any of its domestically organized wholly owned subsidiaries may act as Warrant Registrar.

(c) The Corporation may remove any Warrant Registrar upon written notice to such Warrant Registrar and to the Warrant Agent; provided, however, that no such removal shall become effective until (i) acceptance of an appointment by a successor as evidenced by an appropriate agreement entered into by the Corporation and such successor Warrant Registrar and delivered to the Warrant Agent or (ii) notification to the Warrant Agent that the Warrant Agent shall serve as Warrant Registrar until the appointment of a successor in accordance with clause (i) above. The Warrant Registrar may resign at any time upon written notice to the Corporation and the Warrant Agent; provided, however, that the Warrant Agent may resign as Warrant Registrar only if the Warrant Agent also resigns as Warrant Agent in accordance with Section 3.6.

(d) Until a Warrant Certificate is transferred in the Registry, the Corporation and the Warrant Agent may deem and treat the Person in whose name a Warrant Certificate is registered in the Registry as the absolute owner of such Warrant Certificate for all purposes whatsoever and neither the Corporation nor the Warrant Agent shall be affected by notice to the contrary.

2.4 Holder Lists.

The Warrant Agent shall preserve in as current a form as is reasonably practicable the most recent list available to it of the names and addresses of the Holders. If the Warrant Agent is not the Warrant Registrar, the Corporation shall furnish, or cause the Warrant Registrar to furnish, to the Warrant Agent, in writing at such times as the Warrant Agent may request in writing, a list in such form and as of such date as the Warrant Agent may reasonably require of the names and addresses of Holders.

(a) Obligations with Respect to Transfers and Exchanges of Warrants.

(i) To permit registrations of transfers and exchanges, the Corporation shall execute and the Warrant Agent shall countersign, by either manual or facsimile signature, Warrant Certificates at the Warrant Registrar’s request.

(ii) No service charge shall be made for any registration of transfer or exchange, but the Corporation may require payment of a sum sufficient to cover any tax, assessments, or governmental charge payable in connection therewith (other than any such transfer taxes, assessments, or similar governmental charge payable upon exchanges to be registered in the name of the registered Holder effecting the exchange). The Warrant Agent shall have no duty or obligation under any Section of this Warrant Agreement requiring the payment of taxes, assessments, and/or governmental charges unless and until it is satisfied that all such taxes, assessments, and/or governmental charges have been paid.

(iii) All Warrant Certificates issued upon any transfer or exchange pursuant to the terms of this Warrant Agreement shall evidence the same terms and shall be entitled to the same benefits under this Warrant Agreement as the Warrant Certificates surrendered upon such transfer or exchange.

(b) The Warrant Agent shall have no obligation or duty to monitor, determine or inquire as to compliance with any restrictions on transfer imposed under this Warrant Agreement or under applicable law with respect to any transfer of any interest in any Warrant other than to require delivery of such certificates and other documentation or evidence as are expressly required by, and to do so if and when expressly required by, the terms of this Warrant Agreement, and to examine the same to determine substantial compliance as to form with the express requirements hereof.

2.5 Lost, Stolen, Destroyed, Defaced or Mutilated Warrant Certificate.

If a mutilated Warrant Certificate is surrendered to the Warrant Agent or if the Holder of a Warrant claims that the Warrant Certificate has been lost, destroyed, stolen or defaced, the Corporation shall issue and the Warrant Agent shall countersign, by either manual or facsimile signature, a replacement Warrant Certificate of like tenor and representing an equivalent number of Warrants, if the requirements of Section 8-405 of the Uniform Commercial Code are met, such that the Holder (a) notifies the Corporation or the Warrant Agent within a reasonable time after such Holder has notice of such loss, destruction or theft and the Warrant Registrar does not register a transfer prior to receiving such notification, (b) makes such request to the Corporation or the Warrant Agent prior to the Warrant being acquired by a protected purchaser as defined in Section 8-303 of the Uniform Commercial Code (a “protected purchaser”) and (c) satisfies any other reasonable requirements of the Warrant Agent. If required by the Warrant Agent or the Corporation, such Holder shall furnish an indemnity bond sufficient in the judgment of the Warrant Agent to protect the Corporation and the Warrant Agent from any loss that either of them may suffer if a Warrant is replaced. The Corporation and the Warrant Agent may charge the Holder for their expenses in replacing a Warrant Certificate. Every replacement Warrant Certificate is an additional obligation of the Corporation. The provisions of this Section 2.5 are exclusive and shall preclude (to the extent lawful) all other rights and remedies with respect to the replacement of mutilated, lost, destroyed or wrongfully taken Warrants.

2.6 Outstanding Warrants.

Warrants outstanding at any time are all Warrant Certificates executed by the Corporation and countersigned by the Warrant Agent except for those canceled by it, those delivered to it for cancellation and those described in this Section 2.6 as not outstanding. A Warrant does not cease to be outstanding because an Affiliate of the Corporation holds the Warrant. A Warrant ceases to be outstanding if the Corporation holds the Warrant. If a Warrant Certificate is replaced pursuant to Section 2.5, it ceases to be outstanding unless the Warrant Agent and the Corporation receive proof satisfactory to them that the replaced Warrant Certificate is held by a protected purchaser.

2.7 Temporary Warrants.

Until Warrant Certificates are ready for delivery, the Corporation may prepare and the Warrant Agent shall countersign, by either manual or facsimile signature, temporary Warrant Certificates (the “Temporary Warrant Certificates”). Temporary Warrant Certificates shall be substantially in the form of Warrant Certificates but may have variations that the Corporation considers appropriate for temporary Warrants. Without unreasonable delay, the Corporation shall prepare and the Warrant Agent shall countersign, by either manual or facsimile signature, Warrant Certificates and deliver them in exchange for Temporary Warrant Certificates upon surrender of such Temporary Warrant Certificates at the office or agency of the Corporation, without charge to the Holder.

2.8 Cancellation.

The Corporation at any time may deliver Warrant Certificates to the Warrant Agent for cancellation. The Warrant Agent and no one else shall cancel all Warrant Certificates surrendered for registration of transfer, exchange, replacement, exercise or cancellation and shall dispose of canceled Warrant Certificates in accordance with its customary procedures or deliver canceled Warrant Certificates to the Corporation pursuant to written direction by an Officer. The Corporation may not issue new Warrant Certificates to replace Warrant Certificates that have been exercised or Warrants which the Corporation has purchased or otherwise acquired. The Warrant Agent shall not countersign Warrant Certificates to replace canceled Warrant Certificates other than pursuant to the terms of this Warrant Agreement.

2.9 CUSIP Numbers.

The Corporation may use “CUSIP” numbers (if then generally in use) in issuing the Warrants and, if so, the Warrant Agent shall also use “CUSIP” numbers in notices to Holders; provided, however, that any such notice may state that no representation is made as to the correctness of such numbers either as printed on the Warrant Certificates or as contained in any notice and that reliance may be placed only on the other identification numbers printed on the Warrant Certificates, and any such notice shall not be affected by any defect in or omission of such numbers.

2.10 Exercise Terms.

(a) Exercise. The Exercise Price of each Warrant, the maximum number of Common Shares issuable upon due exercise of the Warrants (the “Warrant Share Number”), the number of Warrants evidenced by any Warrant Certificate and the expiration time of each Warrant shall be set forth in the related Warrant Certificate. The Exercise Price of each Warrant and the Warrant Share Number are subject to adjustment pursuant to the terms set forth in the Warrant Certificate.

(b) Manner of Exercise and Issuance of Shares. Warrants may be exercised in the manner set forth in Section 1 of the Warrant Certificate, and upon any such exercise, Common Shares shall be issued in the manner set forth in Section 1 of the Warrant Certificate.

(c) Covenant to Make Stock Certificates Available. The Warrant Agent is hereby authorized to requisition from time to time from any stock transfer agents of the Corporation stock certificates required to honor outstanding Warrants upon exercise thereof in accordance with the terms of this Warrant Agreement, and the Corporation agrees to authorize and direct such transfer agents to comply with all such requests of the Warrant Agent. The Corporation shall supply such transfer agents with duly executed

stock certificates for such purposes and shall provide or otherwise make available any cash or script that may be payable upon exercise of the Warrants as provided herein and in each Warrant Certificate.

ARTICLE III
WARRANT AGENT

3.1 Appointment of Warrant Agent.

The Corporation hereby appoints the Warrant Agent to act as agent for the Corporation in accordance with the express provisions of this Warrant Agreement (and no implied terms) and the Warrant Agent hereby accepts such appointment. The Warrant Agent shall not be liable for anything that it may do or refrain from doing in connection with this Warrant Agreement, except for its own gross negligence, willful misconduct or bad faith (each as determined by a final, non-appealable judgment of a court of competent jurisdiction). The Warrant Agent shall act solely as agent for the Corporation, and its duties shall be determined solely by the provisions hereof. The Warrant Agent shall not be liable for any error of judgment made by it, unless it shall be proved that the Warrant Agent was grossly negligent in ascertaining the pertinent facts.

3.2 Rights and Duties of Warrant Agent.

(a) Agent for the Corporation. In acting under this Warrant Agreement and in connection with the Warrant Certificates, the Warrant Agent is acting solely as agent of the Corporation and does not assume any obligation or relationship or agency or trust for or with any of the holders of Warrant Certificates or beneficial owners of Warrants.

(b) Counsel. The Warrant Agent may consult with counsel satisfactory to it (who may be counsel to the Corporation) (and may require an Opinion of Counsel before it acts or refrains from acting), and the advice of such counsel shall be full and complete authorization and protection in respect of any action taken, suffered or omitted by it hereunder in accordance with the advice of such counsel.

(c) Documents. The Warrant Agent shall be protected and shall incur no liability for or in respect of any action taken or thing suffered by it in reliance upon any Warrant Certificate, notice, direction, consent, certificate, affidavit, statement or other paper or document (whether in its original or facsimile form) believed by it to be genuine and to have been presented or signed by the proper parties, and shall have no duty to inquire into or investigate the validity, accuracy or content thereof. The Warrant Agent may conclusively

rely, as to the truth of the statements and the correctness of the opinions expressed therein, upon certificates or opinions furnished to the Warrant Agent and conforming to the requirements of this Warrant Agreement. The Warrant Agent shall not take any instructions or directions except those given in accordance with this Warrant Agreement.

(d) No Implied Obligations. The Warrant Agent shall be obligated to perform only such duties as are specifically set forth herein, and no implied duties or obligations of the Warrant Agent shall be read into this Warrant Agreement against the Warrant Agent. The Warrant Agent shall not be under any obligation to take any action hereunder which may involve it in any expense or liability the payment of which within a reasonable time is not, in its opinion, assured to it. The Warrant Agent shall not be accountable or under any duty or responsibility for the use by the Corporation of any of the Warrant Certificates countersigned by the Warrant Agent and delivered by it to the Holders or on behalf of the Holders pursuant to this Warrant Agreement or for the application by the Corporation of the proceeds of the Warrants. The Warrant Agent shall have no duty or responsibility in case of any default by the Corporation in the performance of its covenants or agreements contained herein or in the Warrant Certificates or in the case of the receipt of any written demand from a Holder with respect to such default, including, without limiting the generality of the foregoing, any duty or responsibility to initiate or attempt to initiate any proceedings at law or otherwise or to make any demand upon the Corporation. Without limiting the foregoing, unless otherwise expressly provided in this Warrant Agreement, the Warrant Agent shall not be subject to, nor be required to comply with, or determine if any person or entity has complied with, the Warrant Certificate or any other agreement between or among the parties hereto, even though reference thereto may be made in this Warrant Agreement, or to comply with any notice, instruction, direction, request or other communication, paper or document other than as expressly set forth in this Warrant Agreement.

(e) Not Responsible for Adjustments or Validity of Stock. The Warrant Agent shall not at any time be under any duty or responsibility to any Holder to determine whether any facts exist that may require an adjustment of the number of Common Shares issuable upon exercise of each Warrant or the Exercise Price, or with respect to the nature or extent of any adjustment when made, or with respect to the method employed, or herein or in any supplemental agreement provided to be employed, in making the same. The Warrant Agent shall not be accountable with respect to the validity or value of any Common Shares or of any securities or

property which may at any time be issued or delivered upon the exercise of any Warrant or upon any adjustment to the Exercise Price, and it makes no representation with respect thereto. The Warrant Agent shall not be responsible for any failure of the Corporation to make any cash payment or to issue, transfer or deliver any Common Shares or stock certificates upon the surrender of any Warrant Certificate for the purpose of exercise or upon any adjustment to the Exercise Price, or to comply with the covenants set forth in Section 5 of the Warrant Certificate or this Warrant Agreement. The number of Common Shares to be issued on a Cashless Exercise (as defined in the Warrant) will be determined by the Corporation (with written notice thereof to the Warrant Agent) using the formula set forth in the Warrant. The Warrant Agent shall have no duty or obligation to investigate or confirm whether the Corporation’s determination of the number of Common Shares to be issued on such exercise is accurate or correct.

(f) May Act Through Agents. The Warrant Agent may execute any of the trusts or powers hereunder or perform any duties hereunder either directly or by or through agents or attorneys and the Warrant Agent shall not be responsible for any loss or expense arising out of, or in connection with, the actions, omissions, misconduct or negligence on the part of any agent or attorney, so long as the Warrant Agent acts without gross negligence, willful misconduct or bad faith (as each is determined by a final, non-appealable judgment of a court of competent jurisdiction) in connection with the selection of such agents or attorneys.

(g) No Liability for Interest. The Warrant Agent shall not be under any liability for interest on any monies at any time received by it pursuant to any of the provisions of this Warrant Agreement nor shall it be obligated to segregate such monies from other monies held by it, except as required by law. The Warrant Agent shall not be responsible for advancing funds on behalf of the Corporation.

(h) Not Accountable for Application of Proceeds. The Warrant Agent shall not be accountable or under any duty or responsibility for the application by the Corporation of any proceeds of the issuance of any Warrants.

(i) Not Liable for Special, Indirect or Consequential Loss or Damage. Notwithstanding anything in this Warrant Agreement to the contrary, in no event will the Warrant Agent be liable for special, indirect, punitive, incidental or consequential loss or damage of any kind whatsoever (including but not limited to lost profits) even if the Warrant Agent has been advised of the likelihood of such

loss or damage and regardless of the form of action. Any liability of the Warrant Agent under this Warrant Agreement shall be limited to the amount of annual fees paid by the Corporation to the Warrant Agent.

(j) Force Majeure. In no event shall the Warrant Agent be responsible or liable for any failure or delay in the performance of its obligations under this Warrant Agreement arising out of or caused by, directly or indirectly, forces beyond its reasonable control, including without limitation strikes, work stoppages, accidents, acts of war or terrorism, civil or military disturbances, nuclear or natural catastrophes or acts of God, and interruptions, loss or malfunctions of utilities, communications or computer (software or hardware) services.

(k) No Risk of Funds. No provision of this Warrant Agreement shall require the Warrant Agent to expend or risk its own funds or otherwise incur any financial liability in the performance of any of its duties hereunder or in the exercise of its rights.

(l) Whenever in the performance of its duties under this Warrant Agreement the Warrant Agent deems it necessary or desirable that any fact or matter be proved or established by the Corporation prior to taking or suffering any action hereunder, such fact or matter may be deemed to be conclusively proved and established by a certificate signed by any authorized officer and delivered to the Warrant Agent; and such certificate will be full authorization to the Warrant Agent for any action taken, suffered or omitted by it under the provisions of this Warrant Agreement in reliance upon such certificate. The Warrant Agent is hereby authorized and directed to accept instructions with respect to the performance of its duties hereunder from any one of the authorized officers, and to apply to such officers for advice or instructions in connection with its duties, and it will not be liable for any action taken, suffered or omitted to be taken by it in accordance with instructions of any such officer.

(m) The Corporation will perform, execute, acknowledge and deliver or cause to be performed, executed, acknowledged and delivered all such further and other acts, instruments and assurances as may reasonably be required by the Warrant Agent for the carrying out or performing by the Warrant Agent of the provisions of this Warrant Agreement.

(n) The Warrant Agent will not be under any duty or responsibility to insure compliance with any applicable federal or state securities

laws in connection with the issuance, transfer or exchange of Warrant Certificates.

(o) In the event the Warrant Agent believes any ambiguity or uncertainty exists hereunder or in any notice, instruction, direction, request or other communication, paper or document received by the Warrant Agent hereunder, Warrant Agent, may, in its sole discretion, refrain from taking any action, and shall be fully protected and shall not be liable in any way to the Corporation or any Holder or other person or entity for refraining from taking such action, unless the Warrant Agent receives written instructions signed by the Corporation which eliminates such ambiguity or uncertainty to the satisfaction of Warrant Agent. The provisions of this Section 3.2 shall survive the termination of this Warrant Agreement and the resignation or removal of the Warrant Agent.

3.3 Individual Rights of Warrant Agent.

The Warrant Agent and any stockholder, director, officer or employee of the Warrant Agent may buy, sell or deal in any of the Warrants or other securities of the Corporation or its Affiliates or become pecuniarily interested in transactions in which the Corporation or its Affiliates may be interested, or contract with or lend money to the Corporation or its Affiliates or otherwise act as fully and freely as though it were not the Warrant Agent under this Warrant Agreement. Nothing herein shall preclude the Warrant Agent from acting in any other capacity for the Corporation or for any other legal entity.

3.4 Warrant Agent’s Disclaimer.

The Warrant Agent shall not be responsible for and makes no representation as to the validity or adequacy of this Warrant Agreement or the Warrant Certificates and it shall not be responsible for any statement of fact or recitals of the Corporation in this Warrant Agreement or the Warrant Certificates other than the Warrant Agent’s countersignature, or be required to verify the same, and all such statements and recitals are and will be deemed to have been made by the Corporation only. The Warrant Agent will not be under any responsibility or liability in respect of the validity of this Warrant Agreement or the execution and delivery hereof (except the due execution and delivery hereof by the Warrant Agent) or in respect of the validity or execution of any Warrant Certificate (except the due countersignature thereof by the Warrant Agent); nor will it be responsible or liable for any breach by the Corporation of any covenant or condition contained in this Warrant Agreement or in any Warrant Certificate; nor will it be responsible or liable for any adjustment required under the provisions hereof or responsible for the manner, method or amount of any adjustment or the ascertaining of the existence of facts that would require any adjustment (except with respect to the exercise of Warrants evidenced by Warrant Certificates after actual written notice of any adjustment); nor will it by any act hereunder be deemed to make any representation or warranty as to the authorization or reservation of any shares of stock or other securities to be issued pursuant to this Warrant Agreement or any Warrant Certificate or as to whether any shares of stock or other securities will, when issued, be validly authorized and issued, fully paid and nonassessable.

3.5 Compensation and Indemnity.

The Corporation agrees to pay to the Warrant Agent from time to time such compensation for its services as shall be agreed to in writing from time to time by the Corporation and the Warrant Agent. The Corporation shall reimburse the Warrant Agent upon request for all reasonable out-of-pocket expenses, including costs of collection, in addition to the compensation for its services, incurred by the Warrant Agent in connection with the preparation, delivery, administration, execution and amendment of this Warrant Agreement and the exercise and performance of its duties hereunder. Such expenses shall include the reasonable compensation, expenses, disbursements and advances of the Warrant Agent’s agents and counsel. The Corporation shall indemnify the Warrant Agent, its officers, directors, agents and counsel, and any predecessor Warrant Agent against, and hold it harmless from, any and all loss, liability, suit, action, proceeding, judgment, settlement, cost, claim, damage or expense (including reasonable agents’ and attorneys’ fees and expenses), including taxes (other than taxes based upon, measured by, or determined by the income of the Warrant Agent) incurred by it without gross negligence, willful misconduct or bad faith (as each is determined by a final, nonappealable judgment of a court of competent jurisdiction) for any action taken, suffered or omitted by the Warrant Agent in connection with the acceptance and administration of this Warrant Agreement, including the costs and expenses of defending against any claim of liability arising therefrom, directly or indirectly. The Warrant Agent shall notify the Corporation promptly of any claim for which it may seek indemnity promptly upon obtaining actual notice thereof; provided, however, that any failure so to notify the Corporation shall not relieve the Corporation of its indemnity obligations hereunder. The Corporation shall defend the claim and the Warrant Agent shall provide reasonable cooperation at the Corporation’s expense in the defense. The Warrant Agent may have separate counsel and the Corporation shall pay the fees and expenses of such counsel; provided, however, that the Corporation shall not be required to pay such fees and expenses if it assumes the Warrant Agent’s defense and, in the Warrant Agent’s reasonable judgment based upon the advice of counsel, there is no conflict of interest between the Corporation and the Warrant Agent in connection with such defense. The Corporation need not reimburse any expense or indemnify against any loss, liability or expense incurred by the Warrant Agent through the Warrant Agent’s own willful misconduct, gross negligence or bad faith (as each is determined by a final, non-appealable judgment of a court of competent jurisdiction). The Corporation’s payment obligations pursuant to this Section 3.5 shall survive the termination of this Warrant Agreement and the resignation or removal of the Warrant Agent. To secure the Corporation’s payment obligations under this Warrant Agreement, the Warrant Agent shall have a lien prior to the Holders on all money or property held or collected by the Warrant Agent. The Warrant Agent shall not be obligated to take any action which it believes would expose it to expense or liability or to a risk of incurring expense or liability, unless it has been furnished with assurances of repayment or indemnity satisfactory to it.

3.6 Successor Warrant Agent.

(a) The Corporation To Provide and Maintain Warrant Agent. The Corporation agrees for the benefit of the Holders that there shall be a Warrant Agent at all times until all of the Warrants have been exercised or are no longer exercisable.

(b) Resignation and Removal. The Warrant Agent may at any time resign by giving written notice to the Corporation of such intention on its part, specifying the date on which its desired resignation shall become effective; provided, however, that such date shall not be less than 30 days after the date on which such notice is given unless the Corporation otherwise agrees. The Warrant Agent hereunder may be removed at any time by the filing with it of an instrument in writing signed by or on behalf of the Corporation and specifying such removal and the date when it shall become effective, which date shall not be less than 30 days after such notice is given unless the Warrant Agent otherwise agrees. Any removal under this Section 3.6(b) shall take effect upon the appointment by the Corporation as hereinafter provided of a successor Warrant Agent (which shall be a bank or trust company authorized under the laws of the jurisdiction of its organization to exercise corporate trust powers) and the acceptance of such appointment by such successor Warrant Agent. The obligations of the Corporation under Sections 3.2, 3.3, 3.4 and 3.5 shall continue to the extent set forth herein notwithstanding the resignation or removal of the Warrant Agent.

(c) The Corporation To Appoint Successor. In the event that at any time the Warrant Agent shall resign, or shall be removed, or shall become incapable of acting, or shall be adjudged a bankrupt or insolvent, or shall commence a voluntary case under the federal bankruptcy laws, as now or hereafter constituted, or under any other applicable federal or state bankruptcy, insolvency or similar law or shall consent to the appointment of or taking possession by a receiver, custodian, liquidator, assignee, trustee, sequestrator (or other similar official) of the Warrant Agent or its property or affairs, or shall make an assignment for the benefit of creditors, or shall admit in writing its inability to pay its debts generally as they become due, or shall take corporate action in furtherance of any such action, or a decree or order for relief by a court having jurisdiction in the premises shall have been entered in respect of the Warrant Agent in an involuntary case under the Federal bankruptcy laws, as now or hereafter constituted, or any other applicable Federal or state bankruptcy, insolvency or similar law, or a decree or order by a court having jurisdiction in the premises shall have been entered for the appointment of a receiver, custodian, liquidator, assignee, trustee, sequestrator (or similar official) of the Warrant Agent or of its property or affairs, or any public officer shall take charge or control of the Warrant Agent or of its property or affairs for the purpose of rehabilitation, conservation, winding up or liquidation, a successor Warrant Agent, qualified as aforesaid, shall be appointed by the Corporation by an instrument in writing, filed with the successor

Warrant Agent. Upon the appointment of a successor Warrant Agent and acceptance by the successor Warrant Agent of such appointment, the Warrant Agent shall cease to be Warrant Agent hereunder; provided, however, that in the event of the resignation of the Warrant Agent under this subsection (c), such resignation shall be effective on the earlier of (i) the date specified in the Warrant Agent’s notice of resignation and (ii) the appointment and acceptance of a successor Warrant Agent hereunder.

(d) Successor To Expressly Assume Duties. Any successor Warrant Agent appointed hereunder shall execute, acknowledge and deliver to its predecessor and to the Corporation an instrument accepting such appointment hereunder, and thereupon such successor Warrant Agent, without any further act, deed or conveyance, shall become vested with all the rights and obligations of such predecessor with like effect as if originally named as Warrant Agent hereunder, and such predecessor, upon payment of its charges and disbursements then unpaid, shall thereupon become obligated to transfer, deliver and pay over, and such successor Warrant Agent shall be entitled to receive, all monies, securities and other property on deposit with or held by such predecessor, as Warrant Agent hereunder.

(e) Successor by Merger. If the Warrant Agent consolidates with, merges or converts into, or transfers all or substantially all its corporate trust business or assets to, another entity or banking association, the resulting, surviving or transferee entity without any further act shall be the successor Warrant Agent without the execution or filing of any paper or any further act on the part of any of the parties hereto, including, without limitation any successor to the Warrant Agent first named above. In case at the time such successor or successors by merger, conversion or consolidation to the Warrant Agent shall succeed to the agency created by this Warrant Agreement, any of the Warrant Certificates shall have been countersigned but not delivered, any such successor to the Warrant Agent may adopt the countersignature of any predecessor Warrant Agent, and deliver such Warrant Certificates so countersigned; and in case at that time any of the Warrant Certificates shall not have been countersigned, any successor to the Warrant Agent may countersign such Warrant Certificates either in the name of any predecessor hereunder or in the name of the successor to the Warrant Agent.

(f) In the event that the Corporation has not appointed a successor Warrant Agent within 60 days of the Warrant Agent’s removal, the Corporation shall be the successor Warrant Agent.

ARTICLE IV
MISCELLANEOUS

4.1 Persons Benefiting.

Nothing in this Warrant Agreement is intended or shall be construed to confer upon any Person other than the Corporation, the Warrant Agent and the Holders any right, remedy or claim under or by reason of this Warrant Agreement or any part hereof.

4.2 Rights of Holders.

Except as set forth herein or in the Warrant Certificates, holders of unexercised Warrants are not entitled to (i) receive dividends or other distributions, (ii) receive notice of or vote at any meeting of the stockholders, (iii) consent to any action of the stockholders, (iv) receive notice of any other proceedings of the Corporation, (v) exercise any preemptive right or (vi) exercise any other rights whatsoever as stockholders of the Corporation. Nothing in this Warrant Certificate shall be construed to give the Holders any rights as a holder of Common Shares until such time, if any, as the Warrants evidenced by the Warrant Certificates are exercised in accordance with the provisions of this Warrant Agreement and the Warrant Certificates.

4.3 Amendment, Waiver, Modification, Etc.

This Warrant Agreement and the Warrant Certificates may be amended by the parties hereto without the consent of any Holder for the purpose of curing any ambiguity, or of curing, correcting or supplementing any defective provision contained herein or adding or changing any other provisions with respect to matters or questions arising under this Warrant Agreement and the Warrant Certificates as the Corporation and the Warrant Agent may deem necessary or desirable; provided, however, that such action shall not materially adversely affect the rights of any of the Holders. Any term or terms of this Warrant Agreement and the Warrant Certificates may be amended and the observance of any term of this Warrant Agreement and the Warrant Certificates may be waived (either generally or in a particular instance and either retroactively or prospectively), as set forth in the Warrant Certificates. Any waiver, amendment or modification effected in accordance with this Section 4.3 shall be binding upon each Holder of Warrants at the time outstanding and the Corporation. The Warrant Agent shall have no duty to determine whether any such amendment would have an effect on the rights or interests of the holders of the Warrants. The Warrant Agent may, but shall not be obligated to, execute any amendment or supplement which affects the rights or changes or increases the duties or obligations of the Warrant Agent.

4.4 Notices.

All notices, demands and other communications provided for or permitted hereunder shall be made in writing and shall be by registered or certified mail, return receipt requested, facsimile, nationally recognized next-Business Day courier or personal delivery, if to the holder of a Warrant, at such holder’s last known address, as it appears on the records of the Warrant Agent;

if to the Corporation:

Hydrogenics Corporation
5985 Mclaughlin Road
Mississauga, Ontario, L5R 1B8
Canada
Attention: Chief Financial Officer

Telephone: 905-361-3633
Facsimile: 905-361-3626
Email: ldavis@hydrogenics.com

with a copy to:

Torys LLP
79 Wellington Street West
Toronto, Ontario, M5K 1N2
Canada
Attention: John Emanoilidis, Esq.

Telephone: 416-865-0040
Facsimile: 416-865-7380
Email: jemanoilidis@torys.com

if to the Warrant Agent:

Mellon Investor Services LLC

Newport Office Center VII

480 Washington Blvd.

Jersey City, NJ 07310

Attention: Relationship Manager

Telephone: 201-680-2198

Facsimile: 201-680-4610

with a copy to:

Mellon Investor Services LLC

Newport Office Center VII

480 Washington Blvd.

Jersey City, NJ 07310

Attention: General Counsel

Telephone: 201-680-2198

Facsimile: 201-680-4610

The Corporation or the Warrant Agent by notice to the other may designate additional or different addresses for subsequent notices or communications. Failure to mail a notice or communication to a Holder or any defect in it shall not affect its sufficiency with respect to other Holders. If a notice or communication is mailed in the manner provided above, it

is duly given, whether or not the addressee receives it. All such notices and communications shall be deemed to have been duly given (i) when delivered by hand, if personally delivered, or when delivered by facsimile followed by a mailed copy of such notice; (ii) one Business Day following the date delivered to a courier with overnight delivery requested, if delivered by a recognized commercial overnight courier service guaranteeing next Business Day delivery; and (iii) five Business Days after being deposited in the mail, postage prepaid, if mailed.

4.5 Governing Law; Waiver of Jury Trial.

THIS WARRANT AGREEMENT SHALL BE CONSTRUED AND ENFORCED IN ACCORDANCE WITH, AND THE RIGHTS OF THE PARTIES SHALL BE GOVERNED BY, THE LAWS OF THE STATE OF NEW YORK APPLICABLE TO AGREEMENTS MADE AND TO BE PERFORMED ENTIRELY WITHIN SUCH STATE BUT WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY. EACH OF THE CORPORATION AND THE WARRANT AGENT IRREVOCABLY WAIVES, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY AND ALL RIGHT TO TRIAL BY JURY IN ANY LEGAL PROCEEDING ARISING OUT OF OR RELATING TO THIS WARRANT AGREEMENT OR THE TRANSACTIONS CONTEMPLATED HEREBY.

4.6 Successors.

The terms of this Warrant Agreement and the Warrant Certificates shall be binding upon and shall inure to the benefit of the respective successors or permitted assigns of the Corporation, the Warrant Agent and the Holders. Nothing in this Warrant Agreement and the Warrant Certificates shall be construed to give to any Person other than the Corporation, the Warrant Agent or the Holders any legal or equitable right, remedy or claim under this Warrant Agreement and the Warrant Certificates, and this Warrant Agreement and the Warrant Certificates shall be for the sole and exclusive benefit of the Corporation, the Warrant Agent and the Holders.

4.7 Counterparts.

This Warrant Agreement may be executed in any number of counterparts, each of which shall be considered an original, but all of which together shall constitute one and the same instrument.

4.8 Headings.

The headings of the Articles and Sections of this Warrant Agreement and the Warrant Certificates have been inserted for convenience of reference only, are not intended to be considered a part hereof and shall not modify or restrict any of the terms or provisions hereof.

4.9 Severability.

The provisions of this Warrant Agreement and the Warrant Certificates are severable, and if any clause or provision shall be held invalid, illegal or unenforceable in whole

or in part in any jurisdiction, then such invalidity or unenforceability shall affect in that jurisdiction only such clause or provision, or part thereof, and shall not in any manner affect such clause or provision in any other jurisdiction or any other clause or provision of this Warrant Agreement and the Warrant Certificates in any jurisdiction.

NOTHING IN THIS WARRANT AGREEMENT SHALL LIMIT OR HAVE ANY AFFECT ON ANY TERMS, CONDITIONS OR PROVISIONS OF THE WARRANTS, ANY RIGHTS OF ANY HOLDERS OR ANY OF THE OBLIGATIONS OF THE CORPORATION UNDER ANY OF THE WARRANTS.

[Remainder of Page Intentionally Left Blank]

IN WITNESS WHEREOF, the parties have caused this Warrant Agreement to be duly executed as of the date first written above.

HYDROGENICS CORPORATION


By:	/s/ Lawrence E. Davis
	Name:	Lawrence E. Davis
	Title:	Chief Financial Officer

MELLON INVESTOR SERVICES LLC, as Warrant Agent

By:	/s/ Joseph J. Carratuno
	Name:	Joseph J. Carratuno
	Title:	Vice President

[FORM OF SERIES A WARRANT]

HYDROGENICS CORPORATION

WARRANT TO PURCHASE COMMON STOCK

Series A Warrant No.:

Date of Issuance: January [ ], 2010 (“Issuance Date”)

Hydrogenics Corporation, a corporation existing pursuant to the Canada Business Corporations Act (the “Company”), hereby certifies that, for good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, IROQUOIS MASTER FUND LTD., [OTHER BUYERS], the registered holder hereof or its permitted assigns (the “Holder”), is entitled, subject to the terms set forth below, to purchase from the Company, at the Exercise Price (as defined below) then in effect, upon exercise of this Warrant to Purchase Common Stock (including any Warrants to Purchase Common Stock issued in exchange, transfer or replacement hereof, the “Warrant”), at any time or times on or after the Issuance Date, but not after 4:59 p.m., New York time, on the Expiration Date (as defined below), 2,991,943 (subject to adjustment as provided herein) fully paid and nonassessable shares of Common Stock (as defined below) (the “Warrant Shares”). Except as otherwise defined herein, capitalized terms in this Warrant shall have the meanings set forth in Section 16. This Warrant is one of the Warrants to Purchase Common Stock (the “SPA Warrants”) issued pursuant to Section 1 of that certain Securities Purchase Agreement, dated as of January 11, 2010, by and among the Company and the investors (the “Buyers”) referred to therein (the “Securities Purchase Agreement”).

1. EXERCISE OF WARRANT.

(a) Mechanics of Exercise. Subject to the terms and conditions hereof (including, without limitation, the limitations set forth in Section 1(f)), this Warrant may be exercised by the Holder on any day on or after the Issuance Date, in whole or in part, by delivery (whether via facsimile or otherwise) of a written notice, in the form attached hereto as Exhibit A (the “Exercise Notice”), of the Holder’s election to exercise this Warrant. Within one (1) Trading Day following an exercise of this Warrant as aforesaid, the Holder shall deliver payment to the Company of an amount equal to the Exercise Price in effect on the date of such exercise multiplied by the number of Warrant Shares as to which this Warrant was so exercised (the “Aggregate Exercise Price”) in cash or via wire transfer of immediately available funds if the Holder did not notify the Company in such Exercise Notice that such exercise was made pursuant to a Cashless Exercise (as defined in Section 1(d)). The Holder shall not be required to deliver the original of this Warrant in order to effect an exercise hereunder. Execution and delivery of an Exercise Notice with respect to less than all of the Warrant Shares shall have the same effect as cancellation of the original of this Warrant and issuance of a new Warrant evidencing the right to purchase the remaining number of Warrant Shares. Execution and delivery of an Exercise Notice for all of the then-remaining Warrant Shares shall have the same effect as cancellation of the original of this Warrant after delivery of the Warrant Shares in

accordance with the terms hereof. On or before the first (1st) Trading Day following the date on which the Company has received an Exercise Notice, the Company shall transmit by facsimile an acknowledgment of confirmation of receipt of such Exercise Notice to the Holder and the Company’s transfer agent (the “Transfer Agent”). On or before the third (3rd) Trading Day following the date on which the Company has received such Exercise Notice, the Company shall (X) provided that the Transfer Agent is participating in The Depository Trust Company (“DTC”) Fast Automated Securities Transfer Program, upon the request of the Holder, credit such aggregate number of shares of Common Stock to which the Holder is entitled pursuant to such exercise to the Holder’s or its designee’s balance account with DTC through its Deposit/ Withdrawal at Custodian system, or (Y) if the Transfer Agent is not participating in the DTC Fast Automated Securities Transfer Program, issue and deliver to the Holder or, at the Holder’s instruction pursuant to the Exercise Notice, the Holder’s agent or designee, in each case, sent by reputable overnight courier to the address as specified in the applicable Exercise Notice, a certificate, registered in the Company’s share register in the name of the Holder or its designee (as indicated in the applicable Exercise Notice), for the number of shares of Common Stock to which the Holder is entitled pursuant to such exercise. Upon delivery of an Exercise Notice, the Holder shall be deemed for all corporate purposes to have become the holder of record of the Warrant Shares with respect to which this Warrant has been exercised, irrespective of the date such Warrant Shares are credited to the Holder’s DTC account or the date of delivery of the certificates evidencing such Warrant Shares (as the case may be). If this Warrant is submitted in connection with any exercise pursuant to this Section 1(a) and the number of Warrant Shares represented by this Warrant submitted for exercise is greater than the number of Warrant Shares being acquired upon an exercise, then, at the request of the Holder, the Company shall as soon as practicable and in no event later than three (3) Business Days after any exercise and at its own expense, issue and deliver to the Holder (or its designee) a new Warrant (in accordance with Section 7(d)) representing the right to purchase the number of Warrant Shares purchasable immediately prior to such exercise under this Warrant, less the number of Warrant Shares with respect to which this Warrant is exercised. No fractional shares of Common Stock are to be issued upon the exercise of this Warrant, but rather the number of shares of Common Stock to be issued shall be rounded up to the nearest whole number. The Company shall pay any and all taxes which may be payable with respect to the issuance and delivery of Warrant Shares upon exercise of this Warrant.

(b) Exercise Price. For purposes of this Warrant, “Exercise Price” means $0.52, subject to adjustment as provided herein.

(c) Company’s Failure to Timely Deliver Securities. If the Company shall fail, for any reason or for no reason, to issue to the Holder within three (3) Trading Days after receipt of the applicable Exercise Notice, a certificate for the number of shares of Common Stock to which the Holder is entitled and register such shares of Common Stock on the Company’s share register or to credit the Holder’s balance account with DTC for such number of shares of Common Stock to which the Holder is entitled upon the Holder’s exercise of this Warrant (as the case may be), then, in addition to all other remedies available to the Holder, the Company shall pay in cash to the Holder on each day after such third (3rd) Trading Day that the issuance of such shares of Common Stock is not timely effected an amount equal to 2% of the product of (A) the aggregate number of shares of Common Stock not issued to the Holder on a timely basis and to which the Holder is entitled and (B) the Closing Sale Price of the Common Stock on the Trading Day

immediately preceding the last possible date on which the Company could have issued such shares of Common Stock to the Holder without violating Section 1(a). In addition to the foregoing, if within three (3) Trading Days after the Company’s receipt of the applicable Exercise Notice, the Company shall fail to issue and deliver a certificate to the Holder and register such shares of Common Stock on the Company’s share register or credit the Holder’s balance account with DTC for the number of shares of Common Stock to which the Holder is entitled upon the Holder’s exercise hereunder (as the case may be), and if on or after such third (3rd) Trading Day the Holder purchases (in an open market transaction or otherwise) shares of Common Stock to deliver in satisfaction of a sale by the Holder of shares of Common Stock issuable upon such exercise that the Holder anticipated receiving from the Company, then, in addition to all other remedies available to the Holder, the Company shall, within three (3) Business Days after the Holder’s request and in the Holder’s discretion, either (i) pay cash to the Holder in an amount equal to the Holder’s total purchase price (including brokerage commissions, if any) for the shares of Common Stock so purchased (the “Buy-In Price”), at which point the Company’s obligation to deliver such certificate or credit the Holder’s balance account with DTC for the number of shares of Common Stock to which the Holder is entitled upon the Holder’s exercise hereunder (as the case may be) (and to issue such shares of Common Stock) shall terminate, or (ii) promptly honor its obligation to deliver to the Holder a certificate or certificates representing such shares of Common Stock or credit the Holder’s balance account with DTC for the number of shares of Common Stock to which the Holder is entitled upon the Holder’s exercise hereunder (as the case may be) and pay cash to the Holder in an amount equal to the excess (if any) of the Buy-In Price over the product of (A) such number of shares of Common Stock times (B) the Closing Sale Price of the Common Stock on the Trading Day immediately preceding the date of the applicable Exercise Notice.

(d) Cashless Exercise. Notwithstanding anything contained herein to the contrary (other than Section 1(f) below), if at the time of exercise hereof the Registration Statement (as defined in the Securities Purchase Agreement) is not effective (or the prospectus contained therein is not available for use) for the issuance by the Company to the Holder of all of the Warrant Shares, then the Holder may, in its sole discretion, exercise this Warrant in whole or in part and, in lieu of making the cash payment otherwise contemplated to be made to the Company upon such exercise in payment of the Aggregate Exercise Price, elect instead to receive upon such exercise the “Net Number” of shares of Common Stock determined according to the following formula (a “Cashless Exercise”):

Net Number = (A x B) - (A x C)

For purposes of the foregoing formula:

A= the total number of shares with respect to which this Warrant is then being exercised.

B= as applicable: (i) the Closing Sale Price of the Common Stock on the Trading Day immediately preceding the date of the applicable Exercise Notice if such Exercise Notice is (1) both executed and delivered pursuant to Section 1(a) hereof

on a day that is not a Trading Day or (2) both executed and delivered pursuant to Section 1(a) hereof on a Trading Day prior to the opening of regular trading hours (as defined in Rule 600(b)(64) of Regulation NMS promulgated under the federal securities laws) on such Trading Day, (ii) the Bid Price of the Common Stock as of the time of the Holder’s execution of the applicable Exercise Notice if such Exercise Notice is executed during regular trading hours on a Trading Day and is delivered within two (2) hours thereafter pursuant to Section 1(a) hereof and (iii) the Closing Sale Price of the Common Stock on the date of the applicable Exercise Notice if the date of such Exercise Notice is a Trading Day and such Exercise Notice is both executed and delivered pursuant to Section 1(a) hereof after the close of regular trading hours on such Trading Day.

C= the Exercise Price then in effect for the applicable Warrant Shares at the time of such exercise.

(e) Disputes. In the case of a dispute as to the determination of the Exercise Price or the arithmetic calculation of the number of Warrant Shares to be issued pursuant to the terms hereof, the Company shall promptly issue to the Holder the number of Warrant Shares that are not disputed and resolve such dispute in accordance with Section 13.

(f) Limitations on Exercises. Notwithstanding anything to the contrary contained in this Warrant, this Warrant shall not be exercisable by the Holder hereof to the extent (but only to the extent) that the Holder or any of its affiliates would beneficially own in excess of 4.9% (the “Maximum Percentage”) of the Common Stock. To the extent the above limitation applies, the determination of whether this Warrant shall be exercisable (vis-à-vis other convertible, exercisable or exchangeable securities owned by the Holder) and of which such securities shall be exercisable (as among all such securities owned by the Holder) shall, subject to such Maximum Percentage limitation, be determined on the basis of the first submission to the Company for conversion, exercise or exchange (as the case may be). No prior inability to exercise this Warrant pursuant to this paragraph shall have any effect on the applicability of the provisions of this paragraph with respect to any subsequent determination of exercisability. For the purposes of this paragraph, beneficial ownership and all determinations and calculations (including, without limitation, with respect to calculations of percentage ownership) shall be determined in accordance with Section 13(d) of the 1934 Act (as defined in the Securities Purchase Agreement) and the rules and regulations promulgated thereunder. The provisions of this paragraph shall be implemented in a manner otherwise than in strict conformity with the terms of this paragraph to correct this paragraph (or any portion hereof) which may be defective or inconsistent with the intended Maximum Percentage beneficial ownership limitation herein contained or to make changes or supplements necessary or desirable to properly give effect to such Maximum Percentage limitation. The limitations contained in this paragraph shall apply to a successor Holder of this Warrant. The holders of Common Stock shall be third party beneficiaries of this paragraph and the Company may not waive this paragraph without the consent of holders of a majority of its Common Stock. For any reason at any time, upon the written or oral request of the Holder, the Company shall within one (1) Business Day confirm orally and in writing to the Holder the number of shares of Common Stock then outstanding, including by virtue of any prior conversion or exercise of convertible or exercisable securities

into Common Stock, including, without limitation, pursuant to this Warrant or securities issued pursuant to the Securities Purchase Agreement.

(g) Insufficient Authorized Shares. The Company shall at all times keep reserved for issuance under this Warrant a number of shares of Common Stock as shall be necessary to satisfy the Company’s obligation to issue shares of Common Stock hereunder (without regard to any limitation otherwise contained herein with respect to the number of shares of Common Stock that may be acquirable upon exercise of this Warrant). If, notwithstanding the foregoing, and not in limitation thereof, at any time while any of the SPA Warrants remain outstanding the Company does not have a sufficient number of authorized and unreserved shares of Common Stock to satisfy its obligation to reserve for issuance upon exercise of the SPA Warrants at least a number of shares of Common Stock equal to the number of shares of Common Stock as shall from time to time be necessary to effect the exercise of all of the SPA Warrants then outstanding (the “Required Reserve Amount”) (an “Authorized Share Failure”), then the Company shall immediately take all action necessary to increase the Company’s authorized shares of Common Stock to an amount sufficient to allow the Company to reserve the Required Reserve Amount for all the SPA Warrants then outstanding. Without limiting the generality of the foregoing sentence, as soon as practicable after the date of the occurrence of an Authorized Share Failure, but in no event later than sixty (60) days after the occurrence of such Authorized Share Failure, the Company shall hold a meeting of its stockholders for the approval of an increase in the number of authorized shares of Common Stock. In connection with such meeting, the Company shall provide each stockholder with a proxy statement and shall use its best efforts to solicit its stockholders’ approval of such increase in authorized shares of Common Stock and to cause its board of directors to recommend to the stockholders that they approve such proposal.

2. ADJUSTMENT OF EXERCISE PRICE AND NUMBER OF WARRANT SHARES. The Exercise Price and number of Warrant Shares issuable upon exercise of this Warrant are subject to adjustment from time to time as set forth in this Section 2.

(a) Stock Dividends and Splits. If the Company, at any time on or after the date of the Securities Purchase Agreement, (i) pays a stock dividend on one or more classes of its then outstanding shares of Common Stock or otherwise makes a distribution on any class of capital stock that is payable in shares of Common Stock, (ii) subdivides (by any stock split, stock dividend, recapitalization or otherwise) one or more classes of its then outstanding shares of Common Stock into a larger number of shares or (iii) combines (by combination, reverse stock split or otherwise) one or more classes of its then outstanding shares of Common Stock into a smaller number of shares, then in each such case the Exercise Price shall be multiplied by a fraction of which the numerator shall be the number of shares of Common Stock outstanding immediately before such event and of which the denominator shall be the number of shares of Common Stock outstanding immediately after such event. Any adjustment made pursuant to clause (i) of this paragraph shall become effective immediately after the record date for the determination of stockholders entitled to receive such dividend or distribution, and any adjustment pursuant to clause (ii) or (iii) of this paragraph shall become effective immediately after the effective date of such subdivision or combination. If any event requiring an adjustment under this paragraph occurs during the period that an Exercise Price is calculated hereunder, then the calculation of such Exercise Price shall be adjusted appropriately to reflect such event.

(b) Adjustment Upon Issuance of Shares of Common Stock. If and whenever on or after the date of the Securities Purchase Agreement, the Company issues or sells, or in accordance with this Section 2 is deemed to have issued or sold, any shares of Common Stock (including the issuance or sale of shares of Common Stock owned or held by or for the account of the Company, but excluding any Excluded Securities (as defined in the Securities Purchase Agreement) issued or sold or deemed to have been issued or sold) for a consideration per share (the “New Issuance Price”) less than a price equal to the Exercise Price in effect immediately prior to such issue or sale or deemed issuance or sale (such Exercise Price then in effect is referred to as the “Applicable Price”) (the foregoing a “Dilutive Issuance”), then immediately after such Dilutive Issuance, the Exercise Price then in effect shall be reduced to an amount equal to the New Issuance Price. For purposes of determining the adjusted Exercise Price under this Section 2(b), the following shall be applicable:

(i) Issuance of Options. If the Company in any manner grants or sells any Options and the lowest price per share for which one share of Common Stock is issuable upon the exercise of any such Option or upon conversion, exercise or exchange of any Convertible Securities issuable upon exercise of any such Option is less than the Applicable Price, then such share of Common Stock shall be deemed to be outstanding and to have been issued and sold by the Company at the time of the granting or sale of such Option for such price per share. For purposes of this Section 2(b)(i), the “lowest price per share for which one share of Common Stock is issuable upon the exercise of any such Options or upon conversion, exercise or exchange of any Convertible Securities issuable upon exercise of any such Option” shall be equal to the sum of the lowest amounts of consideration (if any) received or receivable by the Company with respect to any one share of Common Stock upon the granting or sale of the Option, upon exercise of the Option and upon conversion, exercise or exchange of any Convertible Security issuable upon exercise of such Option. Except as contemplated below, no further adjustment of the Exercise Price shall be made upon the actual issuance of such shares of Common Stock or of such Convertible Securities upon the exercise of such Options or upon the actual issuance of such shares of Common Stock upon conversion, exercise or exchange of such Convertible Securities.

(ii) Issuance of Convertible Securities. If the Company in any manner issues or sells any Convertible Securities and the lowest price per share for which one share of Common Stock is issuable upon the conversion, exercise or exchange thereof is less than the Applicable Price, then such share of Common Stock shall be deemed to be outstanding and to have been issued and sold by the Company at the time of the issuance or sale of such Convertible Securities for such price per share. For the purposes of this Section 2(b)(ii), the “lowest price per share for which one share of Common Stock is issuable upon the conversion, exercise or exchange thereof” shall be equal to the sum of the lowest amounts of consideration (if any) received or receivable by the Company with respect to one share of Common Stock upon the issuance or sale of the Convertible Security and upon conversion, exercise or exchange of such Convertible Security. Except as contemplated below, no further adjustment of the Exercise Price shall be made upon the actual issuance of such shares of Common Stock upon conversion, exercise or exchange of such Convertible Securities, and if any such issue or sale of such Convertible Securities is made upon exercise of any Options for which adjustment of this Warrant has been or is

to be made pursuant to other provisions of this Section 2(b), except as contemplated below, no further adjustment of the Exercise Price shall be made by reason of such issue or sale.

(iii) Change in Option Price or Rate of Conversion. If the purchase or exercise price provided for in any Options, the additional consideration, if any, payable upon the issue, conversion, exercise or exchange of any Convertible Securities, or the rate at which any Convertible Securities are convertible into or exercisable or exchangeable for shares of Common Stock increases or decreases at any time, the Exercise Price in effect at the time of such increase or decrease shall be adjusted to the Exercise Price which would have been in effect at such time had such Options or Convertible Securities provided for such increased or decreased purchase price, additional consideration or increased or decreased conversion rate, as the case may be, at the time initially granted, issued or sold. For purposes of this Section 2(b)(iii), if the terms of any Option or Convertible Security that was outstanding as of the date of issuance of this Warrant are increased or decreased in the manner described in the immediately preceding sentence, then such Option or Convertible Security and the shares of Common Stock deemed issuable upon exercise, conversion or exchange thereof shall be deemed to have been issued as of the date of such increase or decrease. No adjustment pursuant to this Section 2(b) shall be made if such adjustment would result in an increase of the Exercise Price then in effect.

(iv) Calculation of Consideration Received. In case any Option or Convertible Security is issued in connection with the issue or sale of other securities of the Company, together comprising one integrated transaction, (x) the Options will be deemed to have been issued for a value determined by use of the Black Scholes Option Pricing Model (the “Option Value”) and (y) the other securities issued or sold in such integrated transaction shall be deemed to have been issued for the difference of (I) the aggregate consideration received by the Company, less (II) the Option Value. If any shares of Common Stock, Options or Convertible Securities are issued or sold or deemed to have been issued or sold for cash, the consideration received therefor will be deemed to be the net amount of consideration received by the Company therefor. If any shares of Common Stock, Options or Convertible Securities are issued or sold for a consideration other than cash, the amount of such consideration received by the Company will be the fair value of such consideration, except where such consideration consists of publicly traded securities, in which case the amount of consideration received by the Company for such securities will be the arithmetic average of the VWAPs of such security for each of the five (5) Trading Days immediately preceding the date of receipt. If any shares of Common Stock, Options or Convertible Securities are issued to the owners of the non-surviving entity in connection with any merger in which the Company is the surviving entity, the amount of consideration therefor will be deemed to be the fair value of such portion of the net assets and business of the non-surviving entity as is attributable to such shares of Common Stock, Options or Convertible Securities, as the case may be. The fair value of any consideration other than cash or publicly traded securities will be determined jointly by the Company and the Holder. If such parties are unable to reach agreement within ten (10) days after the occurrence of an event requiring valuation (the “Valuation Event”), the fair value of such consideration will be determined within five (5) Trading Days after the tenth (10th) day following such Valuation Event by an independent, reputable appraiser jointly

selected by the Company and the Holder. The determination of such appraiser shall be final and binding upon all parties absent manifest error and the fees and expenses of such appraiser shall be borne by the Company.

(v) Record Date. If the Company takes a record of the holders of shares of Common Stock for the purpose of entitling them (A) to receive a dividend or other distribution payable in shares of Common Stock, Options or in Convertible Securities or (B) to subscribe for or purchase shares of Common Stock, Options or Convertible Securities, then such record date will be deemed to be the date of the issue or sale of the shares of Common Stock deemed to have been issued or sold upon the declaration of such dividend or the making of such other distribution or the date of the granting of such right of subscription or purchase (as the case may be).

(c) Number of Warrant Shares. Simultaneously with any adjustment to the Exercise Price pursuant to paragraph (a) of this Section 2, the number of Warrant Shares that may be purchased upon exercise of this Warrant shall be increased or decreased proportionately, so that after such adjustment the aggregate Exercise Price payable hereunder for the adjusted number of Warrant Shares shall be the same as the aggregate Exercise Price in effect immediately prior to such adjustment (without regard to any limitations on exercise contained herein).

(d) Other Events. In the event that the Company (or any direct or indirect subsidiary thereof) shall take any action to which the provisions hereof are not strictly applicable, or, if applicable, would not operate to protect the Holder from dilution or if any event occurs of the type contemplated by the provisions of this Section 2 but not expressly provided for by such provisions (including, without limitation, the granting of stock appreciation rights, phantom stock rights or other rights with equity features), then the Company’s board of directors shall in good faith determine and implement an appropriate adjustment in the Exercise Price and the number of Warrant Shares (if applicable) so as to protect the rights of the Holder, provided that no such adjustment pursuant to this Section 2(d) will increase the Exercise Price or decrease the number of Warrant Shares as otherwise determined pursuant to this Section 2, provided further that if the Holder does not accept such adjustments as appropriately protecting its interests hereunder against such dilution, then the Company’s board of directors and the Holder shall agree, in good faith, upon an independent investment bank of nationally recognized standing to make such appropriate adjustments, whose determination shall be final and binding and whose fees and expenses shall be borne by the Company.

(e) Calculations. All calculations under this Section 2 shall be made to the nearest cent or the nearest 1/100th of a share, as applicable. The number of shares of Common Stock outstanding at any given time shall not include shares owned or held by or for the account of the Company, and the disposition of any such shares shall be considered an issue or sale of Common Stock.

rearrangement, scheme of arrangement or other similar transaction) (a “Distribution”), at any time after the issuance of this Warrant, then, in each such case, the Holder shall be entitled to participate in such Distribution to the same extent that the Holder would have participated therein if the Holder had held the number of shares of Common Stock acquirable upon complete exercise of this Warrant (without regard to any limitations on exercise hereof, including without limitation, the Maximum Percentage) immediately before the date on which a record is taken for such Distribution, or, if no such record is taken, the date as of which the record holders of shares of Common Stock are to be determined for the participation in such Distribution (provided, however, to the extent that the Holder’s right to participate in any such Distributions would result in the Holder exceeding the Maximum Percentage, then the Holder shall not be entitled to participate in such Distribution to such extent (or the beneficial ownership of any such shares of Common Stock as a result of such Distribution to such extent) and such Distribution to such extent shall be held in abeyance for the benefit of the Holder until such time, if ever, as its right thereto would not result in the Holder exceeding the Maximum Percentage, provided further such Distribution shall be held in abeyance for the benefit of the Holder until such time as the Holder exercises this Warrant (whether in whole or in part), and, subject to the foregoing proviso, upon each exercise of this Warrant the Company shall make such Distribution to the Holder with respect to each Warrant Share for which this Warrant is so exercised until such time as this Warrant has been exercised in full).

4. PURCHASE RIGHTS; FUNDAMENTAL TRANSACTIONS.

(a) Purchase Rights. In addition to any adjustments pursuant to Section 2 above, if at any time the Company grants, issues or sells any Options, Convertible Securities or rights to purchase stock, warrants, securities or other property pro rata to the record holders of any class of shares of Common Stock (the “Purchase Rights”), then the Holder will be entitled to acquire, upon the terms applicable to such Purchase Rights, the aggregate Purchase Rights which the Holder could have acquired if the Holder had held the number of shares of Common Stock acquirable upon complete exercise of this Warrant (without regard to any limitations on exercise hereof, including without limitation, the Maximum Percentage) immediately before the date on which a record is taken for the grant, issuance or sale of such Purchase Rights, or, if no such record is taken, the date as of which the record holders of shares of Common Stock are to be determined for the grant, issue or sale of such Purchase Rights (provided, however, to the extent that the Holder’s right to participate in any such Purchase Right would result in the Holder exceeding the Maximum Percentage, then the Holder shall not be entitled to participate in such Purchase Right to such extent (or beneficial ownership of such shares of Common Stock as a result of such Purchase Right to such extent) and such Purchase Right to such extent shall be held in abeyance for the Holder until such time, if ever, as its right thereto would not result in the Holder exceeding the Maximum Percentage).

substantially similar in form and substance to this Warrant, including, without limitation, which is exercisable for a corresponding number of shares of capital stock equivalent to the shares of Common Stock acquirable and receivable upon exercise of this Warrant (without regard to any limitations on the exercise of this Warrant) prior to such Fundamental Transaction, and with an exercise price which applies the exercise price hereunder to such shares of capital stock (but taking into account the relative value of the shares of Common Stock pursuant to such Fundamental Transaction and the value of such shares of capital stock, such adjustments to the number of shares of capital stock and such exercise price being for the purpose of protecting the economic value of this Warrant immediately prior to the consummation of such Fundamental Transaction). Upon the consummation of each Fundamental Transaction, the Successor Entity shall succeed to, and be substituted for (so that from and after the date of the applicable Fundamental Transaction, the provisions of this Warrant and the other Transaction Documents referring to the “Company” shall refer instead to the Successor Entity), and may exercise every right and power of the Company and shall assume all of the obligations of the Company under this Warrant and the other Transaction Documents with the same effect as if such Successor Entity had been named as the Company herein. Upon consummation of each Fundamental Transaction, the Successor Entity shall deliver to the Holder confirmation that there shall be issued upon exercise of this Warrant at any time after the consummation of the applicable Fundamental Transaction, in lieu of the shares of Common Stock (or other securities, cash, assets or other property (except such items still issuable under Sections 3 and 4(a) above, which shall continue to be receivable thereafter)) issuable upon the exercise of this Warrant prior to the applicable Fundamental Transaction, such shares of publicly traded common stock (or its equivalent) of the Successor Entity (including its Parent Entity) which the Holder would have been entitled to receive upon the happening of the applicable Fundamental Transaction had this Warrant been exercised immediately prior to the applicable Fundamental Transaction (without regard to any limitations on the exercise of this Warrant), as adjusted in accordance with the provisions of this Warrant. In addition to and not in substitution for any other rights hereunder, prior to the consummation of each Fundamental Transaction pursuant to which holders of shares of Common Stock are entitled to receive securities or other assets with respect to or in exchange for shares of Common Stock (a “Corporate Event”), the Company shall make appropriate provision to insure that the Holder will thereafter have the right to receive upon an exercise of this Warrant at any time after the consummation of the applicable Fundamental Transaction but prior to the Expiration Date, in lieu of the shares of the Common Stock (or other securities, cash, assets or other property (except such items still issuable under Sections 3 and 4(a) above, which shall continue to be receivable thereafter)) issuable upon the exercise of the Warrant prior to such Fundamental Transaction, such shares of stock, securities, cash, assets or any other property whatsoever (including warrants or other purchase or subscription rights) which the Holder would have been entitled to receive upon the happening of the applicable Fundamental Transaction had this Warrant been exercised immediately prior to the applicable Fundamental Transaction (without regard to any limitations on the exercise of this Warrant). Provision made pursuant to the preceding sentence shall be in a form and substance reasonably satisfactory to the Holder.

(c) Black Scholes Value. Notwithstanding the foregoing and the provisions of Section 4(b) above, in the event of a Fundamental Transaction (other than a Fundamental Transaction resulting solely from a merger or consolidation in which the Company is the surviving entity, the Common Stock continues to be publicly traded on an Eligible Market (other than the TSX) following such merger or consolidation and an amount of shares of Common

Stock which is less than 20% of the Company’s issued and outstanding shares of Common Stock outstanding immediately prior to such merger or consolidation are issued in connection with such merger or consolidation), if the Holder has not exercised this Warrant in full prior to the consummation of such Fundamental Transaction, at the request of the Holder delivered before the ninetieth (90th) day after the consummation of such Fundamental Transaction, the Company or the Successor Entity (as the case may be) shall purchase this Warrant from the Holder on the date of such request by paying to the Holder cash in an amount equal to the Black Scholes Value of the unexercised portion of this Warrant that remained on the date of the consummation of such Fundamental Transaction.

(d) Application. The provisions of this Section 4 shall apply similarly and equally to successive Fundamental Transactions and Corporate Events and shall be applied as if this Warrant (and any such subsequent warrants) were fully exercisable and without regard to any limitations on the exercise of this Warrant (provided that the Holder shall continue to be entitled to the benefit of the Maximum Percentage, applied however with respect to shares of capital stock registered under the 1934 Act and thereafter receivable upon exercise of this Warrant (or any such other warrant)).

5. NONCIRCUMVENTION. The Company hereby covenants and agrees that the Company will not, by amendment of its Articles of Incorporation (as defined in the Securities Purchase Agreement), Bylaws (as defined in the Securities Purchase Agreement) or through any reorganization, transfer of assets, consolidation, merger, scheme of arrangement, dissolution, issue or sale of securities, or any other voluntary action, avoid or seek to avoid the observance or performance of any of the terms of this Warrant, and will at all times in good faith carry out all the provisions of this Warrant and take all action as may be required to protect the rights of the Holder. Without limiting the generality of the foregoing, the Company (i) shall not increase the par value of any shares of Common Stock receivable upon the exercise of this Warrant above the Exercise Price then in effect, (ii) shall take all such actions as may be necessary or appropriate in order that the Company may validly and legally issue fully paid and nonassessable shares of Common Stock upon the exercise of this Warrant, and (iii) shall, so long as any of the SPA Warrants are outstanding, take all action necessary to reserve and keep available out of its authorized and unissued shares of Common Stock, solely for the purpose of effecting the exercise of the SPA Warrants, the maximum number of shares of Common Stock as shall from time to time be necessary to effect the exercise of the SPA Warrants then outstanding (without regard to any limitations on exercise).

6. WARRANT HOLDER NOT DEEMED A STOCKHOLDER. Except as otherwise specifically provided herein, the Holder, solely in its capacity as a holder of this Warrant, shall not be entitled to vote or receive dividends or be deemed the holder of share capital of the Company for any purpose, nor shall anything contained in this Warrant be construed to confer upon the Holder, solely in its capacity as the Holder of this Warrant, any of the rights of a stockholder of the Company or any right to vote, give or withhold consent to any corporate action (whether any reorganization, issue of stock, reclassification of stock, consolidation, merger, conveyance or otherwise), receive notice of meetings, receive dividends or subscription rights, or otherwise, prior to the issuance to the Holder of the Warrant Shares which it is then entitled to receive upon the due exercise of this Warrant. In addition, nothing contained in this Warrant shall be construed as imposing any liabilities on the Holder to purchase any securities

(upon exercise of this Warrant or otherwise) or as a stockholder of the Company, whether such liabilities are asserted by the Company or by creditors of the Company. Notwithstanding this Section 6, the Company shall provide the Holder with copies of the same notices and other information given to the stockholders of the Company generally, contemporaneously with the giving thereof to the stockholders.

7. REISSUANCE OF WARRANTS.

(a) Transfer of Warrant. If this Warrant is to be transferred, the Holder shall surrender this Warrant to the Company, whereupon the Company will forthwith issue and deliver upon the order of the Holder a new Warrant (in accordance with Section 7(d)), registered as the Holder may request, representing the right to purchase the number of Warrant Shares being transferred by the Holder and, if less than the total number of Warrant Shares then underlying this Warrant is being transferred, a new Warrant (in accordance with Section 7(d)) to the Holder representing the right to purchase the number of Warrant Shares not being transferred.

(b) Lost, Stolen or Mutilated Warrant. Upon receipt by the Company of evidence reasonably satisfactory to the Company of the loss, theft, destruction or mutilation of this Warrant (as to which a written certification and the indemnification contemplated below shall suffice as such evidence), and, in the case of loss, theft or destruction, of any indemnification undertaking by the Holder to the Company in customary and reasonable form and, in the case of mutilation, upon surrender and cancellation of this Warrant, the Company shall execute and deliver to the Holder a new Warrant (in accordance with Section 7(d)) representing the right to purchase the Warrant Shares then underlying this Warrant.

(c) Exchangeable for Multiple Warrants. This Warrant is exchangeable, upon the surrender hereof by the Holder at the principal office of the Company, for a new Warrant or Warrants (in accordance with Section 7(d)) representing in the aggregate the right to purchase the number of Warrant Shares then underlying this Warrant, and each such new Warrant will represent the right to purchase such portion of such Warrant Shares as is designated by the Holder at the time of such surrender; provided, however, no warrants for fractional shares of Common Stock shall be given.

(d) Issuance of New Warrants. Whenever the Company is required to issue a new Warrant pursuant to the terms of this Warrant, such new Warrant (i) shall be of like tenor with this Warrant, (ii) shall represent, as indicated on the face of such new Warrant, the right to purchase the Warrant Shares then underlying this Warrant (or in the case of a new Warrant being issued pursuant to Section 7(a) or Section 7(c), the Warrant Shares designated by the Holder which, when added to the number of shares of Common Stock underlying the other new Warrants issued in connection with such issuance, does not exceed the number of Warrant Shares then underlying this Warrant), (iii) shall have an issuance date, as indicated on the face of such new Warrant which is the same as the Issuance Date, and (iv) shall have the same rights and conditions as this Warrant.

actions taken pursuant to this Warrant, including in reasonable detail a description of such action and the reason therefor. Without limiting the generality of the foregoing, the Company will give written notice to the Holder (i) immediately upon each adjustment of the Exercise Price and the number of Warrant Shares, setting forth in reasonable detail, and certifying, the calculation of such adjustment(s) and (ii) at least fifteen (15) days prior to the date on which the Company closes its books or takes a record (A) with respect to any dividend or distribution upon the shares of Common Stock, (B) with respect to any grants, issuances or sales of any Options, Convertible Securities or rights to purchase stock, warrants, securities or other property to holders of shares of Common Stock or (C) for determining rights to vote with respect to any Fundamental Transaction, dissolution or liquidation, provided in each case that such information shall be made known to the public prior to or in conjunction with such notice being provided to the Holder and (iii) at least ten (10) Trading Days prior to the consummation of any Fundamental Transaction. To the extent that any notice provided hereunder constitutes, or contains, material, non-public information regarding the Company or any of its subsidiaries, the Company shall simultaneously file such notice with the SEC (as defined in the Securities Purchase Agreement) pursuant to a Current Report on Form 6-K. It is expressly understood and agreed that the time of execution specified by the Holder in each Exercise Notice shall be definitive and may not be disputed or challenged by the Company.

9. AMENDMENT AND WAIVER. Except as otherwise provided herein, the provisions of this Warrant (other than Section 1(f)) may be amended and the Company may take any action herein prohibited, or omit to perform any act herein required to be performed by it, only if the Company has obtained the written consent of the Holder. The Holder shall be entitled, at its option, to the benefit of any amendment of any other similar warrant issued under the Securities Purchase Agreement. No waiver shall be effective unless it is in writing and signed by an authorized representative of the waiving party.

10. SEVERABILITY. If any provision of this Warrant or the application thereof becomes or is declared by a court of competent jurisdiction to be illegal, void or unenforceable, the remainder of the terms of this Warrant will continue in full force and effect.

11. GOVERNING LAW. This Warrant shall be governed by and construed and enforced in accordance with, and all questions concerning the construction, validity, interpretation and performance of this Warrant shall be governed by, the internal laws of the State of New York, without giving effect to any choice of law or conflict of law provision or rule (whether of the State of New York or any other jurisdictions) that would cause the application of the laws of any jurisdictions other than the State of New York.

12. CONSTRUCTION; HEADINGS. This Warrant shall be deemed to be jointly drafted by the Company and the Holder and shall not be construed against any Person as the drafter hereof. The headings of this Warrant are for convenience of reference and shall not form part of, or affect the interpretation of, this Warrant. Terms used in this Warrant but defined in the other Transaction Documents shall have the meanings ascribed to such terms on the Closing Date (as defined in the Securities Purchase Agreement) in such other Transaction Documents unless otherwise consented to in writing by the Holder. Unless otherwise expressly indicated, all dollar amounts referred to in this Warrant are in United States Dollars (“U.S. Dollars”), and all amounts owing under this Warrant shall be paid in U.S. Dollars. All amounts denominated in

other currencies shall be converted in the U.S. Dollar equivalent amount in accordance with the Exchange Rate on the date of calculation. “Exchange Rate” means, in relation to any amount of currency to be converted into U.S. Dollars pursuant to this Agreement, the U.S. Dollar exchange rate as published in the Wall Street Journal on the relevant date of calculation.

13. DISPUTE RESOLUTION. In the case of a dispute as to the determination of the Exercise Price, the Closing Sale Price, the Bid Price or fair market value or the arithmetic calculation of the Warrant Shares (as the case may be), the Company or the Holder (as the case may be) shall submit the disputed determinations or arithmetic calculations (as the case may be) via facsimile (i) within two (2) Business Days after receipt of the applicable notice giving rise to such dispute to the Company or the Holder (as the case may be) or (ii) if no notice gave rise to such dispute, at any time after the Holder learned of the circumstances giving rise to such dispute (including, without limitation, as to whether any issuance or sale or deemed issuance or sale was an issuance or sale or deemed issuance or sale of Excluded Securities). If the Holder and the Company are unable to agree upon such determination or calculation (as the case may be) of the Exercise Price, the Closing Sale Price, the Bid Price or fair market value or the number of Warrant Shares (as the case may be) within three (3) Business Days of such disputed determination or arithmetic calculation being submitted to the Company or the Holder (as the case may be), then the Company shall, within two (2) Business Days submit via facsimile (a) the disputed determination of the Exercise Price, the Closing Sale Price, the Bid Price or fair market value (as the case may be) to an independent, reputable investment bank selected by the Company and approved by the Holder or (b) the disputed arithmetic calculation of the Warrant Shares to the Company’s independent, outside accountant. The Company shall cause at its expense the investment bank or the accountant (as the case may be) to perform the determinations or calculations (as the case may be) and notify the Company and the Holder of the results no later than ten (10) Business Days from the time it receives such disputed determinations or calculations (as the case may be). Such investment bank’s or accountant’s determination or calculation (as the case may be) shall be binding upon all parties absent demonstrable error.

14. REMEDIES, CHARACTERIZATION, OTHER OBLIGATIONS, BREACHES AND INJUNCTIVE RELIEF. The remedies provided in this Warrant shall be cumulative and in addition to all other remedies available under this Warrant and the other Transaction Documents, at law or in equity (including a decree of specific performance and/or other injunctive relief), and nothing herein shall limit the right of the Holder to pursue actual damages for any failure by the Company to comply with the terms of this Warrant. The Company covenants to the Holder that there shall be no characterization concerning this instrument other than as expressly provided herein. Amounts set forth or provided for herein with respect to payments, exercises and the like (and the computation thereof) shall be the amounts to be received by the Holder and shall not, except as expressly provided herein, be subject to any other obligation of the Company (or the performance thereof). The Company acknowledges that a breach by it of its obligations hereunder will cause irreparable harm to the Holder and that the remedy at law for any such breach may be inadequate. The Company therefore agrees that, in the event of any such breach or threatened breach, the holder of this Warrant shall be entitled, in addition to all other available remedies, to an injunction restraining any breach, without the necessity of showing economic loss and without any bond or other security being required. The Company shall provide all information and documentation to the Holder that is reasonably requested by the Holder to enable the Holder to confirm the Company’s compliance with the terms and conditions of this

Warrant (including, without limitation, compliance with Section 2 hereof). The issuance of shares and certificates for shares as contemplated hereby upon the exercise of this Warrant shall be made without charge to the Holder or such shares for any issuance tax or other costs in respect thereof, provided that the Company shall not be required to pay any tax which may be payable in respect of any transfer involved in the issuance and delivery of any certificate in a name other than the Holder or its agent on its behalf.

15. TRANSFER. This Warrant may be offered for sale, sold, transferred or assigned without the consent of the Company.

16. CERTAIN DEFINITIONS. For purposes of this Warrant, the following terms shall have the following meanings:

(a) “Bid Price” means, for any security as of the particular time of determination, the bid price for such security on the Principal Market as reported by Bloomberg as of such time of determination, or, if the Principal Market is not the principal securities exchange or trading market for such security, the bid price of such security on the principal securities exchange or trading market where such security is listed or traded as reported by Bloomberg as of such time of determination, or if the foregoing does not apply, the bid price of such security in the over-the-counter market on the electronic bulletin board for such security as reported by Bloomberg as of such time of determination, or, if no bid price is reported for such security by Bloomberg as of such time of determination, the average of the bid prices of any market makers for such security as reported in the “pink sheets” by Pink Sheets LLC (formerly the National Quotation Bureau, Inc.) as of such time of determination. If the Bid Price cannot be calculated for a security as of the particular time of determination on any of the foregoing bases, the Bid Price of such security as of such time of determination shall be the fair market value as mutually determined by the Company and the Holder. If the Company and the Holder are unable to agree upon the fair market value of such security, then such dispute shall be resolved in accordance with the procedures in Section 13. All such determinations shall be appropriately adjusted for any stock dividend, stock split, stock combination or other similar transaction during such period.

(b) “Black Scholes Value” means the value of this Warrant based on the Black and Scholes Option Pricing Model obtained from the “OV” function on Bloomberg determined as of the day of consummation of the applicable Fundamental Transaction for pricing purposes and reflecting (i) a risk-free interest rate corresponding to the U.S. Treasury rate for a period equal to the remaining term of this Warrant as of the date of the Holder’s request pursuant to Section 4(c), (ii) an expected volatility equal to the greater of 100% and the 100 day volatility obtained from the HVT function on Bloomberg as of the Trading Day immediately following the public announcement of the applicable Fundamental Transaction and, if applicable, (iii) the underlying price per share used in such calculation shall be the sum of the price per share being offered in cash, if any, plus the value of any non-cash consideration, if any, being offered in the applicable Fundamental Transaction.

(d) “Business Day” means any day other than Saturday, Sunday or other day on which commercial banks in the State of New York or the State of New Jersey are authorized or required by law to remain closed.

(e) “Closing Sale Price” means, for any security as of any date, the last closing trade price for such security on the Principal Market, as reported by Bloomberg, or, if the Principal Market begins to operate on an extended hours basis and does not designate the closing trade price, then the last trade price of such security prior to 4:00:00 p.m., New York time, as reported by Bloomberg, or, if the Principal Market is not the principal securities exchange or trading market for such security, the last trade price of such security on the principal securities exchange or trading market where such security is listed or traded as reported by Bloomberg, or if the foregoing does not apply, the last trade price of such security in the over-the-counter market on the electronic bulletin board for such security as reported by Bloomberg, or, if no last trade price is reported for such security by Bloomberg, the average of the ask prices of any market makers for such security as reported in the “pink sheets” by Pink Sheets LLC (formerly the National Quotation Bureau, Inc.). If the Closing Sale Price cannot be calculated for a security on a particular date on any of the foregoing bases, the Closing Sale Price of such security on such date shall be the fair market value as mutually determined by the Company and the Holder. If the Company and the Holder are unable to agree upon the fair market value of such security, then such dispute shall be resolved in accordance with the procedures in Section 13. All such determinations shall be appropriately adjusted for any stock dividend, stock split, stock combination or other similar transaction during such period.

(f) “Common Stock” means (i) the Company’s common shares and (ii) any capital stock into which such common shares shall have been changed or any share capital resulting from a reclassification of such common shares.

(g) “Convertible Securities” means any stock or securities (other than Options) directly or indirectly convertible into or exercisable or exchangeable for shares of Common Stock.

(h) “Eligible Market” means The New York Stock Exchange, the Nasdaq Global Select Market, the Nasdaq Capital Market, NYSE Amex, Toronto Stock Exchange (“TSX”) or the Principal Market.

(i) “Expiration Date” means the date that is the fifth (5th) anniversary of the Issuance Date or, if such date falls on a day other than a Business Day or on which trading does not take place on the Principal Market (a “Holiday”), the next date that is not a Holiday.

(j) “Fundamental Transaction” means that (i) the Company or any of its Subsidiaries shall, directly or indirectly, in one or more related transactions, (1) consolidate or merge with or into (whether or not the Company or any of its Subsidiaries is the surviving corporation) another Person (excluding a merger or consolidation of a wholly-owned Subsidiary into the Company or another wholly-owned Subsidiary only if such merger or consolidation of such wholly-owned Subsidiary and the Company or such wholly-owned Subsidiaries (as applicable) does not involve any other Person), or (2) sell, lease, license, assign, transfer, convey or otherwise dispose of all or substantially all of the properties or assets of the Company or any

of its “significant subsidiaries” (as defined in Rule 1-02 of Regulation S-X) to another Person, or (3) allow another Person to make a purchase, tender or exchange offer that is accepted by the holders of more than 50% of the outstanding shares of Voting Stock of the Company (not including any shares of Voting Stock of the Company held by the Person or Persons making or party to, or associated or affiliated with the Persons making or party to, such purchase, tender or exchange offer), or (4) consummate a stock or share purchase agreement or other business combination (including, without limitation, a reorganization, recapitalization, spin-off or scheme of arrangement) with another Person whereby such other Person acquires more than 50% of the outstanding shares of Voting Stock of the Company (not including any shares of Voting Stock of the Company held by the other Person or other Persons making or party to, or associated or affiliated with the other Persons making or party to, such stock or share purchase agreement or other business combination), or (5) reorganize, recapitalize or reclassify its Common Stock, or (ii) any “person” or “group” (as these terms are used for purposes of Sections 13(d) and 14(d) of the 1934 Act and the rules and regulations promulgated thereunder) is or shall become the “beneficial owner” (as defined in Rule 13d-3 under the 1934 Act), directly or indirectly, of 50% of the aggregate ordinary voting power represented by issued and outstanding Voting Stock of the Company.

(k) “Options” means any rights, warrants or options to subscribe for or purchase shares of Common Stock or Convertible Securities.

(l) “Parent Entity” of a Person means an entity that, directly or indirectly, controls the applicable Person and whose common stock or equivalent equity security is quoted or listed on an Eligible Market, or, if there is more than one such Person or Parent Entity, the Person or Parent Entity with the largest public market capitalization as of the date of consummation of the Fundamental Transaction.

(m) “Person” means an individual, a limited liability company, a partnership, a joint venture, a corporation, a trust, an unincorporated organization, any other entity or a government or any department or agency thereof.

(n) “Principal Market” means the Nasdaq Global Market.

(o) “Successor Entity” means the Person (or, if so elected by the Holder, the Parent Entity) formed by, resulting from or surviving any Fundamental Transaction or the Person (or, if so elected by the Holder, the Parent Entity) with which such Fundamental Transaction shall have been entered into.

(p) “Trading Day” means any day on which the Common Stock is traded on the Principal Market, or, if the Principal Market is not the principal trading market for the Common Stock, then on the principal securities exchange or securities market on which the Common Stock is then traded, provided that “Trading Day” shall not include any day on which the Common Stock is scheduled to trade on such exchange or market for less than 4.5 hours or any day that the Common Stock is suspended from trading during the final hour of trading on such exchange or market (or if such exchange or market does not designate in advance the closing time of trading on such exchange or market, then during the hour ending at 4:00:00 p.m., New York time) unless such day is otherwise designated as a Trading Day in writing by the Holder.

(q) “Voting Stock” of a Person means capital stock of such Person of the class or classes pursuant to which the holders thereof have the general voting power to elect, or the general power to appoint, at least a majority of the board of directors, managers or trustees of such Person (irrespective of whether or not at the time capital stock of any other class or classes shall have or might have voting power by reason of the happening of any contingency).

(r) “VWAP” means, for any security as of any date, the dollar volume-weighted average price for such security on the Principal Market (or, if the Principal Market is not the principal trading market for such security, then on the principal securities exchange or securities market on which such security is then traded) during the period beginning at 9:30:01 a.m., New York time, and ending at 4:00:00 p.m., New York time, as reported by Bloomberg through its “Volume at Price” function or, if the foregoing does not apply, the dollar volume-weighted average price of such security in the over-the-counter market on the electronic bulletin board for such security during the period beginning at 9:30:01 a.m., New York time, and ending at 4:00:00 p.m., New York time, as reported by Bloomberg, or, if no dollar volume-weighted average price is reported for such security by Bloomberg for such hours, the average of the highest closing bid price and the lowest closing ask price of any of the market makers for such security as reported in the “pink sheets” by Pink Sheets LLC (formerly the National Quotation Bureau, Inc.). If VWAP cannot be calculated for such security on such date on any of the foregoing bases, the VWAP of such security on such date shall be the fair market value as mutually determined by the Company and the Holder. If the Company and the Holder are unable to agree upon the fair market value of such security, then such dispute shall be resolved in accordance with the procedures in Section 13. All such determinations shall be appropriately adjusted for any stock dividend, stock split, stock combination or other similar transaction during such period.

[signature page follows]

IN WITNESS WHEREOF, the Company has caused this Warrant to Purchase Common Stock to be duly executed as of the Issuance Date set out above.

	HYDROGENICS CORPORATION


	By:
	Name:
	Title:

EXHIBIT A

EXERCISE NOTICE

TO BE EXECUTED BY THE REGISTERED HOLDER TO EXERCISE THIS

WARRANT TO PURCHASE COMMON STOCK

HYDROGENICS CORPORATION

The undersigned holder hereby exercises the right to purchase of the shares of Common Stock (“Warrant Shares”) of Hydrogenics Corporation, a corporation existing pursuant to the Canada Business Corporations Act (the “Company”), evidenced by Series A Warrant No. (the “Warrant”). Capitalized terms used herein and not otherwise defined shall have the respective meanings set forth in the Warrant.

1. Form of Exercise Price. The Holder intends that payment of the Exercise Price shall be made as:

a “Cash Exercise” with respect to Warrant Shares; and/or

a “Cashless Exercise” with respect to Warrant Shares.

In the event that the Holder has elected a Cashless Exercise with respect to some or all of the Warrant Shares to be issued pursuant hereto, the Holder hereby represents and warrants that (i) this Exercise Notice was executed by the Holder at [a.m.][p.m.] on the date set forth below and (ii) if applicable, the Bid Price as of such time of execution of this Exercise Notice was $ .

2. Payment of Exercise Price. In the event that the Holder has elected a Cash Exercise with respect to some or all of the Warrant Shares to be issued pursuant hereto, the Holder shall pay the Aggregate Exercise Price in the sum of $ to the Company in accordance with the terms of the Warrant.

3. Delivery of Warrant Shares. The Company shall deliver to Holder, or its designee or agent as specified below, Warrant Shares in accordance with the terms of the Warrant. Delivery shall be made to Holder, or for its benefit, to the following address:

Date: ,



Name of Registered Holder

By:
	Name:
	Title:

ACKNOWLEDGMENT

The Company hereby acknowledges this Exercise Notice and hereby directs to issue the above indicated number of shares of Common Stock in accordance with the Transfer Agent Instructions dated , 20 , from the Company and acknowledged and agreed to by .

	HYDROGENICS CORPORATION


	By:
	Name:
	Title:

[FORM OF SERIES B WARRANT]

HYDROGENICS CORPORATION

WARRANT TO PURCHASE COMMON STOCK

Series B Warrant No.:

Date of Issuance: January [ ], 2010 (“Issuance Date”)

Hydrogenics Corporation, a corporation existing pursuant to the Canada Business Corporations Act (the “Company”), hereby certifies that, for good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, IROQUOIS MASTER FUND LTD., [OTHER BUYERS], the registered holder hereof or its permitted assigns (the “Holder”), is entitled, subject to the terms set forth below, to purchase from the Company, at the Exercise Price (as defined below) then in effect, upon exercise of this Warrant to Purchase Common Stock (including any Warrants to Purchase Common Stock issued in exchange, transfer or replacement hereof, the “Warrant”), at any time or times on or after the six (6) month and one (1) day anniversary of the Issuance Date (the “Initial Exercise Date”), but not after 4:59 p.m., New York time, on the Expiration Date (as defined below), 3,258,057 (subject to adjustment as provided herein) fully paid and nonassessable shares of Common Stock (as defined below) (the “Warrant Shares”). Except as otherwise defined herein, capitalized terms in this Warrant shall have the meanings set forth in Section 16. This Warrant is one of the Warrants to Purchase Common Stock (the “SPA Warrants”) issued pursuant to Section 1 of that certain Securities Purchase Agreement, dated as of January 11, 2010, by and among the Company and the investors (the “Buyers”) referred to therein (the “Securities Purchase Agreement”).

1. EXERCISE OF WARRANT.

(a) Mechanics of Exercise. Subject to the terms and conditions hereof (including, without limitation, the limitations set forth in Section 1(f)), this Warrant may be exercised by the Holder on any day on or after the Initial Exercise Date, in whole or in part, by delivery (whether via facsimile or otherwise) of a written notice, in the form attached hereto as Exhibit A (the “Exercise Notice”), of the Holder’s election to exercise this Warrant. Within one (1) Trading Day following an exercise of this Warrant as aforesaid, the Holder shall deliver payment to the Company of an amount equal to the Exercise Price in effect on the date of such exercise multiplied by the number of Warrant Shares as to which this Warrant was so exercised (the “Aggregate Exercise Price”) in cash or via wire transfer of immediately available funds if the Holder did not notify the Company in such Exercise Notice that such exercise was made pursuant to a Cashless Exercise (as defined in Section 1(d)). The Holder shall not be required to deliver the original of this Warrant in order to effect an exercise hereunder. Execution and delivery of an Exercise Notice with respect to less than all of the Warrant Shares shall have the same effect as cancellation of the original of this Warrant and issuance of a new Warrant evidencing the right to purchase the remaining number of Warrant Shares. Execution and delivery of an Exercise Notice for all of the then-remaining Warrant Shares shall have the same effect as cancellation of the original of this Warrant after delivery of the Warrant Shares in

(b) Exercise Price. For purposes of this Warrant, “Exercise Price” means $0.52, subject to adjustment as provided herein.

Net Number = (A x B) - (A x C)

For purposes of the foregoing formula:

A= the total number of shares with respect to which this Warrant is then being exercised.

C= the Exercise Price then in effect for the applicable Warrant Shares at the time of such exercise.

into Common Stock, including, without limitation, pursuant to this Warrant or securities issued pursuant to the Securities Purchase Agreement.

to be made pursuant to other provisions of this Section 2(b), except as contemplated below, no further adjustment of the Exercise Price shall be made by reason of such issue or sale.

(vi) Floor Price. No adjustment pursuant to this Section 2 shall cause the Exercise Price to be less than $0.48 (as adjusted for any stock dividend, stock split, stock combination, reclassification or similar transaction occurring after the Subscription Date) (the “Floor Price”). Notwithstanding the foregoing, nothing contained in this Section 2(b)(vi) shall apply after Shareholder Approval (as defined in the Securities Purchase Agreement) is obtained.

Company, and the disposition of any such shares shall be considered an issue or sale of Common Stock.

3. RIGHTS UPON DISTRIBUTION OF ASSETS. In addition to any adjustments pursuant to Section 2 above, if the Company shall declare or make any dividend or other distribution of its assets (or rights to acquire its assets) to holders of shares of Common Stock, by way of return of capital or otherwise (including, without limitation, any distribution of cash, stock or other securities, property or options by way of a dividend, spin off, reclassification, corporate rearrangement, scheme of arrangement or other similar transaction) (a “Distribution”), at any time after the issuance of this Warrant, then, in each such case, the Holder shall be entitled to participate in such Distribution to the same extent that the Holder would have participated therein if the Holder had held the number of shares of Common Stock acquirable upon complete exercise of this Warrant (without regard to any limitations on exercise hereof, including without limitation, the Maximum Percentage) immediately before the date on which a record is taken for such Distribution, or, if no such record is taken, the date as of which the record holders of shares of Common Stock are to be determined for the participation in such Distribution (provided, however, to the extent that the Holder’s right to participate in any such Distributions would result in the Holder exceeding the Maximum Percentage, then the Holder shall not be entitled to participate in such Distribution to such extent (or the beneficial ownership of any such shares of Common Stock as a result of such Distribution to such extent) and such Distribution to such extent shall be held in abeyance for the benefit of the Holder until such time, if ever, as its right thereto would not result in the Holder exceeding the Maximum Percentage, provided further such Distribution shall be held in abeyance for the benefit of the Holder until such time as the Holder exercises this Warrant (whether in whole or in part), and, subject to the foregoing proviso, upon each exercise of this Warrant the Company shall make such Distribution to the Holder with respect to each Warrant Share for which this Warrant is so exercised until such time as this Warrant has been exercised in full).

4. PURCHASE RIGHTS; FUNDAMENTAL TRANSACTIONS.

(b) Fundamental Transactions. The Company shall not enter into or be party to a Fundamental Transaction unless the Successor Entity assumes in writing all of the obligations of the Company under this Warrant and the other Transaction Documents (as defined in the Securities Purchase Agreement) in accordance with the provisions of this Section 4(b) pursuant to written agreements in form and substance satisfactory to the Holder and approved by the Holder prior to such Fundamental Transaction, including agreements to deliver to the Holder in exchange for this Warrant a security of the Successor Entity evidenced by a written instrument substantially similar in form and substance to this Warrant, including, without limitation, which is exercisable for a corresponding number of shares of capital stock equivalent to the shares of Common Stock acquirable and receivable upon exercise of this Warrant (without regard to any limitations on the exercise of this Warrant) prior to such Fundamental Transaction, and with an exercise price which applies the exercise price hereunder to such shares of capital stock (but taking into account the relative value of the shares of Common Stock pursuant to such Fundamental Transaction and the value of such shares of capital stock, such adjustments to the number of shares of capital stock and such exercise price being for the purpose of protecting the economic value of this Warrant immediately prior to the consummation of such Fundamental Transaction). Upon the consummation of each Fundamental Transaction, the Successor Entity shall succeed to, and be substituted for (so that from and after the date of the applicable Fundamental Transaction, the provisions of this Warrant and the other Transaction Documents referring to the “Company” shall refer instead to the Successor Entity), and may exercise every right and power of the Company and shall assume all of the obligations of the Company under this Warrant and the other Transaction Documents with the same effect as if such Successor Entity had been named as the Company herein. Upon consummation of each Fundamental Transaction, the Successor Entity shall deliver to the Holder confirmation that there shall be issued upon exercise of this Warrant at any time after the consummation of the applicable Fundamental Transaction, in lieu of the shares of Common Stock (or other securities, cash, assets or other property (except such items still issuable under Sections 3 and 4(a) above, which shall continue to be receivable thereafter)) issuable upon the exercise of this Warrant prior to the applicable Fundamental Transaction, such shares of publicly traded common stock (or its equivalent) of the Successor Entity (including its Parent Entity) which the Holder would have been entitled to receive upon the happening of the applicable Fundamental Transaction had this Warrant been exercised immediately prior to the applicable Fundamental Transaction (without regard to any limitations on the exercise of this Warrant), as adjusted in accordance with the provisions of this Warrant. In addition to and not in substitution for any other rights hereunder, prior to the consummation of each Fundamental Transaction pursuant to which holders of shares of Common Stock are entitled to receive securities or other assets with respect to or in exchange for shares of Common Stock (a “Corporate Event”), the Company shall make appropriate provision to insure that the Holder will thereafter have the right to receive upon an exercise of this Warrant at any time after the consummation of the applicable Fundamental Transaction but prior to the Expiration Date, in lieu of the shares of the Common Stock (or other securities, cash, assets or other property (except such items still issuable under Sections 3 and 4(a) above, which shall continue to be receivable thereafter)) issuable upon the exercise of the Warrant prior to such Fundamental Transaction, such shares of stock, securities, cash, assets or any other property whatsoever (including warrants or other purchase or subscription rights) which the Holder would have been entitled to receive upon the happening of the applicable Fundamental Transaction had this Warrant been exercised immediately prior to the applicable Fundamental Transaction

(without regard to any limitations on the exercise of this Warrant). Provision made pursuant to the preceding sentence shall be in a form and substance reasonably satisfactory to the Holder.

(c) Black Scholes Value. Notwithstanding the foregoing and the provisions of Section 4(b) above, in the event of a Fundamental Transaction (including, without limitation, a Fundamental Transaction that occurs prior to the Initial Exercise Date) (other than a Fundamental Transaction resulting solely from a merger or consolidation in which the Company is the surviving entity, the Common Stock continues to be publicly traded on an Eligible Market (other than the TSX) following such merger or consolidation and an amount of shares of Common Stock which is less than 20% of the Company’s issued and outstanding shares of Common Stock outstanding immediately prior to such merger or consolidation are issued in connection with such merger or consolidation), if the Holder has not exercised this Warrant in full prior to the consummation of such Fundamental Transaction, at the request of the Holder delivered before the ninetieth (90th) day after the consummation of such Fundamental Transaction, the Company or the Successor Entity (as the case may be) shall purchase this Warrant from the Holder on the date of such request by paying to the Holder cash in an amount equal to the Black Scholes Value of the unexercised portion of this Warrant that remained on the date of the consummation of such Fundamental Transaction.

upon the Holder, solely in its capacity as the Holder of this Warrant, any of the rights of a stockholder of the Company or any right to vote, give or withhold consent to any corporate action (whether any reorganization, issue of stock, reclassification of stock, consolidation, merger, conveyance or otherwise), receive notice of meetings, receive dividends or subscription rights, or otherwise, prior to the issuance to the Holder of the Warrant Shares which it is then entitled to receive upon the due exercise of this Warrant. In addition, nothing contained in this Warrant shall be construed as imposing any liabilities on the Holder to purchase any securities (upon exercise of this Warrant or otherwise) or as a stockholder of the Company, whether such liabilities are asserted by the Company or by creditors of the Company. Notwithstanding this Section 6, the Company shall provide the Holder with copies of the same notices and other information given to the stockholders of the Company generally, contemporaneously with the giving thereof to the stockholders.

7. REISSUANCE OF WARRANTS.

Shares then underlying this Warrant), (iii) shall have an issuance date, as indicated on the face of such new Warrant which is the same as the Issuance Date, and (iv) shall have the same rights and conditions as this Warrant.

8. NOTICES. Whenever notice is required to be given under this Warrant, unless otherwise provided herein, such notice shall be given in accordance with Section 9(f) of the Securities Purchase Agreement. The Company shall provide the Holder with prompt written notice of all actions taken pursuant to this Warrant, including in reasonable detail a description of such action and the reason therefor. Without limiting the generality of the foregoing, the Company will give written notice to the Holder (i) immediately upon each adjustment of the Exercise Price and the number of Warrant Shares, setting forth in reasonable detail, and certifying, the calculation of such adjustment(s) and (ii) at least fifteen (15) days prior to the date on which the Company closes its books or takes a record (A) with respect to any dividend or distribution upon the shares of Common Stock, (B) with respect to any grants, issuances or sales of any Options, Convertible Securities or rights to purchase stock, warrants, securities or other property to holders of shares of Common Stock or (C) for determining rights to vote with respect to any Fundamental Transaction, dissolution or liquidation, provided in each case that such information shall be made known to the public prior to or in conjunction with such notice being provided to the Holder and (iii) at least ten (10) Trading Days prior to the consummation of any Fundamental Transaction. To the extent that any notice provided hereunder constitutes, or contains, material, non-public information regarding the Company or any of its subsidiaries, the Company shall simultaneously file such notice with the SEC (as defined in the Securities Purchase Agreement) pursuant to a Current Report on Form 6-K. It is expressly understood and agreed that the time of execution specified by the Holder in each Exercise Notice shall be definitive and may not be disputed or challenged by the Company.

12. CONSTRUCTION; HEADINGS. This Warrant shall be deemed to be jointly drafted by the Company and the Holder and shall not be construed against any Person as the drafter hereof.

The headings of this Warrant are for convenience of reference and shall not form part of, or affect the interpretation of, this Warrant. Terms used in this Warrant but defined in the other Transaction Documents shall have the meanings ascribed to such terms on the Closing Date (as defined in the Securities Purchase Agreement) in such other Transaction Documents unless otherwise consented to in writing by the Holder. Unless otherwise expressly indicated, all dollar amounts referred to in this Warrant are in United States Dollars (“U.S. Dollars”), and all amounts owing under this Warrant shall be paid in U.S. Dollars. All amounts denominated in other currencies shall be converted in the U.S. Dollar equivalent amount in accordance with the Exchange Rate on the date of calculation. “Exchange Rate” means, in relation to any amount of currency to be converted into U.S. Dollars pursuant to this Agreement, the U.S. Dollar exchange rate as published in the Wall Street Journal on the relevant date of calculation.

hereunder will cause irreparable harm to the Holder and that the remedy at law for any such breach may be inadequate. The Company therefore agrees that, in the event of any such breach or threatened breach, the holder of this Warrant shall be entitled, in addition to all other available remedies, to an injunction restraining any breach, without the necessity of showing economic loss and without any bond or other security being required. The Company shall provide all information and documentation to the Holder that is reasonably requested by the Holder to enable the Holder to confirm the Company’s compliance with the terms and conditions of this Warrant (including, without limitation, compliance with Section 2 hereof). The issuance of shares and certificates for shares as contemplated hereby upon the exercise of this Warrant shall be made without charge to the Holder or such shares for any issuance tax or other costs in respect thereof, provided that the Company shall not be required to pay any tax which may be payable in respect of any transfer involved in the issuance and delivery of any certificate in a name other than the Holder or its agent on its behalf.

15. TRANSFER. This Warrant may be offered for sale, sold, transferred or assigned without the consent of the Company.

16. CERTAIN DEFINITIONS. For purposes of this Warrant, the following terms shall have the following meanings:

cash, if any, plus the value of any non-cash consideration, if any, being offered in the applicable Fundamental Transaction.

(g) “Convertible Securities” means any stock or securities (other than Options) directly or indirectly convertible into or exercisable or exchangeable for shares of Common Stock.

(h) “Eligible Market” means The New York Stock Exchange, the Nasdaq Global Select Market, the Nasdaq Capital Market, NYSE Amex, Toronto Stock Exchange (“TSX”) or the Principal Market.

(i) “Expiration Date” means the date that is the fifth (5th) anniversary of the Initial Exercise Date or, if such date falls on a day other than a Business Day or on which trading does not take place on the Principal Market (a “Holiday”), the next date that is not a Holiday.

into the Company or another wholly-owned Subsidiary only if such merger or consolidation of such wholly-owned Subsidiary and the Company or such wholly-owned Subsidiaries (as applicable) does not involve any other Person), or (2) sell, lease, license, assign, transfer, convey or otherwise dispose of all or substantially all of the properties or assets of the Company or any of its “significant subsidiaries” (as defined in Rule 1-02 of Regulation S-X) to another Person, or (3) allow another Person to make a purchase, tender or exchange offer that is accepted by the holders of more than 50% of the outstanding shares of Voting Stock of the Company (not including any shares of Voting Stock of the Company held by the Person or Persons making or party to, or associated or affiliated with the Persons making or party to, such purchase, tender or exchange offer), or (4) consummate a stock or share purchase agreement or other business combination (including, without limitation, a reorganization, recapitalization, spin-off or scheme of arrangement) with another Person whereby such other Person acquires more than 50% of the outstanding shares of Voting Stock of the Company (not including any shares of Voting Stock of the Company held by the other Person or other Persons making or party to, or associated or affiliated with the other Persons making or party to, such stock or share purchase agreement or other business combination), or (5) reorganize, recapitalize or reclassify its Common Stock, or (ii) any “person” or “group” (as these terms are used for purposes of Sections 13(d) and 14(d) of the 1934 Act and the rules and regulations promulgated thereunder) is or shall become the “beneficial owner” (as defined in Rule 13d-3 under the 1934 Act), directly or indirectly, of 50% of the aggregate ordinary voting power represented by issued and outstanding Voting Stock of the Company.

(k) “Options” means any rights, warrants or options to subscribe for or purchase shares of Common Stock or Convertible Securities.

(n) “Principal Market” means the Nasdaq Global Market.

day that the Common Stock is suspended from trading during the final hour of trading on such exchange or market (or if such exchange or market does not designate in advance the closing time of trading on such exchange or market, then during the hour ending at 4:00:00 p.m., New York time) unless such day is otherwise designated as a Trading Day in writing by the Holder.

[signature page follows]

IN WITNESS WHEREOF, the Company has caused this Warrant to Purchase Common Stock to be duly executed as of the Issuance Date set out above.

	HYDROGENICS CORPORATION


	By:
	Name:
	Title:

EXHIBIT A

EXERCISE NOTICE

TO BE EXECUTED BY THE REGISTERED HOLDER TO EXERCISE THIS

WARRANT TO PURCHASE COMMON STOCK

HYDROGENICS CORPORATION

The undersigned holder hereby exercises the right to purchase of the shares of Common Stock (“Warrant Shares”) of Hydrogenics Corporation, a corporation existing pursuant to the Canada Business Corporations Act (the “Company”), evidenced by Series B Warrant No. (the “Warrant”). Capitalized terms used herein and not otherwise defined shall have the respective meanings set forth in the Warrant.

1. Form of Exercise Price. The Holder intends that payment of the Exercise Price shall be made as:

a “Cash Exercise” with respect to Warrant Shares; and/or

a “Cashless Exercise” with respect to Warrant Shares.

Date: ,


Name of Registered Holder

By:
	Name:
	Title:

ACKNOWLEDGMENT

	HYDROGENICS CORPORATION


	By:
	Name:
	Title:

Schedule A

SCHEDULE OF HOLDERS

(1) Buyer	(2) Address and Facsimile Number	(3) Number of Series A Warrant Shares	(4) Number of Series B Warrant Shares	(5) Legal Representative’s Address and Facsimile Number

Iroquois Master Fund Ltd.	Iroquois Master Fund Ltd. 641 Lexington Avenue, 26th Floor New York, New York 10022 Facsimile: (212) 207-3452	2,991,943	3,258,057	Greenberg Traurig, LLP 77 W. Wacker Drive, Suite 3100 Chicago, Illinois 60601 Attention: Peter H. Lieberman Todd A. Mazur Facsimile: (312) 456-8435

Alpha Capital Anstalt	c/o LH Financial Services Corp 150 Central Park South, 2nd Fl. New York, New York 10019 Attn: Joe Hammer Facsimile: (212) 586-8244	2,991,943	3,258,057	Elected Not to Provide