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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 SXWZ/upbMMf3spmuEM1XIOI178nd8ia7NvJqAshOs3nkAAGFFVViVX9ErpYt0nTP
 42WzSxoov0DD5OL1WJ4RtA==

<SEC-DOCUMENT>0000891839-04-000038.txt : 20040311
<SEC-HEADER>0000891839-04-000038.hdr.sgml : 20040311
<ACCEPTANCE-DATETIME>20040311164135
ACCESSION NUMBER:		0000891839-04-000038
CONFORMED SUBMISSION TYPE:	4/A
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20040225
FILED AS OF DATE:		20040311

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			FISHBACK ROBERT W
		CENTRAL INDEX KEY:			0001245185

	FILING VALUES:
		FORM TYPE:		4/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-20852
		FILM NUMBER:		04663346

	BUSINESS ADDRESS:	
		STREET 1:		2000 TECHNOLOGY PKWY
		CITY:			NEWARK
		STATE:			NY
		ZIP:			14513
		BUSINESS PHONE:		3153327100

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ULTRALIFE BATTERIES INC
		CENTRAL INDEX KEY:			0000875657
		STANDARD INDUSTRIAL CLASSIFICATION:	MISCELLANEOUS ELECTRICAL MACHINERY, EQUIPMENT & SUPPLIES [3690]
		IRS NUMBER:				161387013
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		2000 TECHNOLOGY PARKWAY
		CITY:			NEWARK
		STATE:			NY
		ZIP:			14513
		BUSINESS PHONE:		3153327100

	MAIL ADDRESS:	
		STREET 1:		2000 TECHNOLOGY PARKWAY
		CITY:			NEWARK
		STATE:			NJ
		ZIP:			14513
</SEC-HEADER>
<DOCUMENT>
<TYPE>4/A
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0201</schemaVersion>

    <documentType>4/A</documentType>

    <periodOfReport>2004-02-25</periodOfReport>

    <dateOfOriginalSubmission>2004-02-27</dateOfOriginalSubmission>

    <issuer>
        <issuerCik>0000875657</issuerCik>
        <issuerName>ULTRALIFE BATTERIES INC</issuerName>
        <issuerTradingSymbol>ULBI</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001245185</rptOwnerCik>
            <rptOwnerName>FISHBACK ROBERT W</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>2000 TECHNOLOGY PARKWAY</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NEWARK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>14513</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>VP of Finance &amp; CFO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Stock Option (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>5.375</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2004-02-25</value>
                <footnoteId id="F1"/>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>5000</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2003-12-21</value>
            </exerciseDate>
            <expirationDate>
                <value>2004-12-21</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, $.10 par value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>5000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>8000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">This amendment is being filed solely to report the closing of this option in Table II.  The purchase of the underlying shares (and subsequent sale of such shares) was previoulsy reported by Mr. Fishback in Table I of his Form 4 filed on 2/27/04.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Robert W. Fishback</signatureName>
        <signatureDate>2004-03-11</signatureDate>
    </ownerSignature>
</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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