The Vivitar BG-E8 Multi-Power Battery Grip allows the Canon EOS Rebel T2i, T3i, T4i & T5i to be powered by two LP-E8 batteries - one in the camera body and one in the BG-E8 - effectively doubling your shooting capacity. The BG-E8 also provides a comfortable vertical grip with an additional shutter release and scroll wheel for easy access to the camera functions when shooting in the vertical orientation. With the included AA battery holder, users can also power the camera with 6 AA batteries.