Pro Battery Grip for Canon EOS 550D/600D/650D/700D Rebel T2i/T3i/T4i/T5i SLR Camera Hold 6 AA batteries or 2 LP-E8 Li-ion batteries. Vertical shutter with half-press function. More comfortable vertical shooting Doubling the battery capacity of your camera, effectively extending your shooting time. Professional edition with vertical-grip shutter-release button, main dial, AE-L button, Index/Reduce button and Exposure button.