The Canon BG-E11 battery grip for 5D Mark III Camera is an optional battery grip with enhanced ergonomics designed specifically for the Canon EOS 5D Mark III. 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.