The Pro Battery Grip for the Canon EOS 5D Mark II can hold 6 AA batteries or 2 LP-E6 li-ion batteries, doubling the battery capacity. Vertical shutter release button makes shooting in a vertical position easier, adding stability to the camera.
It provides convenience with an additional shutter release, main dial, AE lock/FE lock and AF point selection controls for easier vertical shooting. The design and quality of the grip follows that of the original BG-E6 very closely and even has intercompatible AA battery tray.
There are further improvement in the design of the grip by adding in grooves that fits the palm much more comfortably.
Battery Grip For Canon EOS 5D Mark II X1 AA Battery Pack X1