Used models of this remote do not have battery covers as of 9-14-06

MODEL: CU-VSX105

PN: AXD7083, VSX305/406, CSX406, HTP101, HTP201, PDF505, PIOHTP101, USX406, VSK305, VSX405, VSX406, PACK, For REMOTE VSX305/406, Optimus STAV3570

Originally supplied with models: CSX406, CUVSX105, D3260K, D3260Q, HTP100, HTP101, HTP200, HTP201, PDF505, PIOHTP101, USX406, VSK305, VSX305, VSX305/KCXJ, VSX305/KCXJI, VSX305/KUXJ, VSX305/KUXJI, VSX405, VSX405/KCXJ, VSX405/KCXJI, VSX405/KUXJ, VSX405/KUXJI, VSX405/SDXJ, VSX405/SDXJI, VSX406, VSX425/HLXJ, VSX425/HLXJI, VSX425/YPWXJ, VSX425/YPWXJI

Battery Required : AA Battery 2 pack
Guaranteed Compatible Universal : Anderic RRU401, Use code: 4254, 4109, 4014, 4020, 4053, 4142, 4166, 4008, 4010 (click here for programming instructions)
Dimensions: 2.00 x 6.00 x 1.00 (W x L x D, inches)