-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 Mx4sYRIHMvaQZWUmBIcrk6Qyn/xuTJ2J5G+6F1jmbWim1+UH5aLNSJgkGsFrvCvz
 Nv+MxN6dMrzOtYapHTt90A==

<SEC-DOCUMENT>0000875657-08-000008.txt : 20080311
<SEC-HEADER>0000875657-08-000008.hdr.sgml : 20080311
<ACCEPTANCE-DATETIME>20080311141053
ACCESSION NUMBER:		0000875657-08-000008
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20080307
FILED AS OF DATE:		20080311
DATE AS OF CHANGE:		20080311

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:			NY
		ZIP:			14513

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			FAIN PHILIP A
		CENTRAL INDEX KEY:			0001294958

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-20852
		FILM NUMBER:		08680218

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		(585) 732-6110

	MAIL ADDRESS:	
		STREET 1:		C/O CXO ON THE GO OF DELAWARE, LLC
		STREET 2:		3349 MONROE AVENUE, # 256
		CITY:			ROCHESTER
		STATE:			NY
		ZIP:			14618

	FORMER NAME:	
		FORMER CONFORMED NAME:	Fain Phillip
		DATE OF NAME CHANGE:	20040622
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2008-03-07</periodOfReport>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001294958</rptOwnerCik>
            <rptOwnerName>FAIN PHILIP A</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>Vice President</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Common Stock, $.10 par value</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>12.7385</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2008-03-07</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>50000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2015-03-07</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock; $.10 par value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>50000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">This grant vests as follows:  16,667 shares on 3/7/09; 16,666 shares on 3/7/10 and 16,667 shares on 3/7/11.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/Peter F. Comerford; attorney-in-fact for Philip A. Fain</signatureName>
        <signatureDate>2008-03-11</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----
