The BG-E11 is dedicated strictly to the EOS 5D Mark III, and permits up to 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 III's movie mode or Live View, the BG-E11 is an outstanding accessory. Like previous Canon battery grips, the BG-E11 provides full vertical shooting controls, which can be independently turned on or off as the photographer desires.
