digipower pgr-cxt rechargeable battery pack grip for canon digital rebel xt xti slr cameras
digipower pgr-cxt rechargeable lithium-ion battery pack amp grip for canon rebel xt amp xti . more than double the power and shooting capacity of your digital slr camera . built-in rechargeable lithium battery . up to 2500 pictures per charge . up to 5x more battery power . rechargeable up to 500 times . retains tripod mounting thread .