The Canon BG-E6 is a totally new optional battery grip specifically dedicated to the EOS 5D Mark II. The BG-E6 can be operated with one or two LP-E6 battery packs installed. With two packs, the already-impressive battery life is doubled, compared to using a single LP-E6 pack in-camera. Alternatively, the grip and camera can be powered using six AA batteries via the supplied holder. For extended use of the EOS 5D Mark II’s movie mode or Live View, the BG-E6 is an outstanding accessory. The BG-E6 also provides full vertical shooting controls, which can be independently turned on or off as the photographer desires. Many users find the battery grip can enhance camera handling, especially when shooting vertical pictures.