Exhibit 99.4

November 9, 2022

Consent of Fasken Martineau DuMoulin LLP

We hereby consent to the use of our name on the cover page and under the headings “Documents Filed as Part of the U.S. Registration Statement”, “Plan of Distribution” and “Legal Matters”, and to the reference to our name and use of our opinion under the heading “Eligibility for Investment” in the prospectus supplement dated November 9, 2022, relating to the offering by Electra Battery Materials Corporation (the “Company”) of units of the Company, which forms part of the Registration Statement on Form F-10 (File No. 333-264982), as amended.

In giving this consent, we do not acknowledge that we come within the category of persons whose consent is required by the United States Securities Act of 1933, as amended, or the rules and regulations thereunder.

/s/ Fasken Martineau DuMoulin LLP

Fasken Martineau DuMoulin LLP