The Canon BG-E13 Battery Grip for 6D Cameras is powered by two Battery Pack LP-E6 (one pack or two), six AA-size/LR6 batteries or an optional AC Adapter Kit ACK-E6. It features a variety of operating controls such as shutter button, Main Dial, AF point selection button, AE lock/FE lock button, AF start button, multi-controller, and multi-function button. This is ideal for high volume and easy vertical shooting.----