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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 FNcLKM3yCg40eo7iELpjT7SGmBIkG6D8ihDwFsY9FPXrxBGg8joc6/DzMSU7S+Yu
 0fZt6Dn7oHmdAu1zSM75Mw==

<SEC-DOCUMENT>0001017386-09-000022.txt : 20090317
<SEC-HEADER>0001017386-09-000022.hdr.sgml : 20090317
<ACCEPTANCE-DATETIME>20090317155026
ACCESSION NUMBER:		0001017386-09-000022
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20090316
FILED AS OF DATE:		20090317
DATE AS OF CHANGE:		20090317

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			UNIVERSAL POWER GROUP INC.
		CENTRAL INDEX KEY:			0001372000
		STANDARD INDUSTRIAL CLASSIFICATION:	WHOLESALE-ELECTRICAL APPARATUS & EQUIPMENT, WIRING SUPPLIES [5063]
		IRS NUMBER:				751288690
		STATE OF INCORPORATION:			TX
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1720 HAYDEN ROAD
		CITY:			CARROLLTON
		STATE:			TX
		ZIP:			75006
		BUSINESS PHONE:		4698921122

	MAIL ADDRESS:	
		STREET 1:		1720 HAYDEN ROAD
		CITY:			CARROLLTON
		STATE:			TX
		ZIP:			75006

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	UNIVERAL POWER GROUP INC.
		DATE OF NAME CHANGE:	20060808

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			ZUNICOM INC
		CENTRAL INDEX KEY:			0000886912
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-BUSINESS SERVICES, NEC [7389]
		STATE OF INCORPORATION:			TX
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-33207
		FILM NUMBER:		09688055

	BUSINESS ADDRESS:	
		STREET 1:		4315 WEST LOVERS LANE
		CITY:			DALLAS
		STATE:			TX
		ZIP:			75209
		BUSINESS PHONE:		(214) 352-8674

	MAIL ADDRESS:	
		STREET 1:		4315 WEST LOVERS LANE
		CITY:			DALLAS
		STATE:			TX
		ZIP:			75209

	FORMER NAME:	
		FORMER CONFORMED NAME:	TECH ELECTRO INDUSTRIES INC/TX
		DATE OF NAME CHANGE:	19930328
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2009-03-16</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001372000</issuerCik>
        <issuerName>UNIVERSAL POWER GROUP INC.</issuerName>
        <issuerTradingSymbol>UPG</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000886912</rptOwnerCik>
            <rptOwnerName>ZUNICOM INC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>4315 WEST LOVERS LANE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>DALLAS</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>75209</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2009-03-16</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>100</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>1.25</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2048870</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <ownerSignature>
        <signatureName>Zunicom, Inc. by: /s/ William Kim Wah Tan</signatureName>
        <signatureDate>2009-03-17</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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