The BG-E16 Battery Grip from Jupio is designed for the Canon EOS 7D Mark II DSLR Camera. It holds up to two LP-E6 Li-ion battery packs, effectively doubling your shooting time, while providing increased comfort, stability, and control when shooting in vertical and landscape positions. A heavy-duty wheel lets you lock the unit tightly to the camera, and this ergonomically-designed grip also features a shutter release button, main command dial, joystick, on-off button, AF point selection button, AE lock button, and a multi-function button. If you don't have a charged camera battery on hand, you can use six AA batteries inside the grip in an emergency.