Uses 2x LP-E6 or 6x AA batteries Vertical shutter release Secondary control dial The Canon BG-E6 battery grip is able to accept two LP-E6 lithium ion or six AA batteries, giving the Canon EOS 5D Mark II the ability to record videos and capture stills for a longer period. The Canon BG-E6 also offers alternative controls for shooting in the portrait orientation, including a secondary shutter release, increasing the functionality of the camera. For the advancing photographer likely to be away from a power source or simply wanting to take more stills or video the Canon BG-E6 is an extremely useful accessory.