Canon BG-E7 Battery Grip for EOS 7D

The Canon Battery Grip BG-E7 is an optional battery grip designed specifically for the Canon EOS 7D. It allows users to load a choice of one or two LP-E6 battery packs. With two packs the already-impressive battery life is doubled compared to using a single LP-E6 pack in-camera. This is especially useful when taking advantage of the camera's movie mode or Live View mode - operating modes that use more power. In addition with the included battery magazine you can alternatively also run the camera off six AA batteries.