The Zeikos Professional Battery Power Grip for Canon 60D is an affordable way to double your shooting time and greatly improve the stability of your grip while shooting with the Canon 60D. This professional battery grip operates on 2 rechargeable lithium-ion batteries or 6 AA batteries for much longer shooting sessions, without having to stop to change or replace batteries. The grip attaches to the camera body in such a way that your grip will be much more secure, and there's a vertical firing release with a lock, so you don't have to awkwardly reach for the shutter release when the camera is turned for shooting verticals.