The new optional battery grip for the EOS 5D Mark II, the Battery Grip BP-E6.
It's
dedicated strictly to the new EOS 5D Mark II, and permits one (or
two) LP-E6 battery packs to be installed. With two packs, the
already-impressive battery life is doubled, compared to using a single
LP-E6 pack in-camera. Especially for extended use of the EOS 5D Mark
II?s movie mode or Live View, the BG-E6 is an outstanding accessory.
Like
previous Canon battery grips, the BG-E6 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 for shooting vertical pictures.