B002TIUNGC Bower XBGC1000D Digital Power Battery Grip for Canon 450D/500D/1000D/Rebel EOS Xsi

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Designed to extend shooting time by 2x
Fits two LP-E5 batteries or AA batteries
Includes an extra shutter release button for convenient vertical shooting
For Canon Rebel EOS Xsi, 450D, 500D and 1000D