Battery grip for EOS 6D
The Canon Battery Grip BG-E13 is an optional battery grip designed specifically for the Canon EOS 6D. It allows users to load a choice of one or two LP-E6 batteries or Six AA batteries. With two packs, the already impressive battery life is doubled, compared to using a single LP-E6 pack in-camera.
Furthermore the BG-E13 provides full vertical shooting controls, which can be independently turned on or off as the photographer needs to enhance camera handling, especially for shooting vertical pictures.