This Multi-Power Battery Pack for Nikon D5100 is used with Nikon D5100 Camera only, has the same functions as the original Nikon grip MB-D51. It can hold one EN-EL14 rechargeable battery (Note: now can not hold the AA battery) – effectively doubling your shooting capacity. This battery grip includes an alternate shutter-release button for vertical shoots and the AE-L/AF-L button, Multi selector, main dials and subcommand dials to increase its functions, used more conveniently. Camera menu options allow users to choose whether the camera battery or this battery grip first.