Vivitar MB-D12 Pro Series Multi-Power Battery Grip for Nikon D800, D800E & D810 Camera, Black, 6.5 x 5 x 3.4 inches, (VIV-PG-D810)

The Vivitar MB-D12 Series Multi-Power Battery Grip allows the D800, D800E & D810 to be powered by two EN-EL15 batteries -- one in the camera body and one in the MB-D12 -- effectively doubling your shooting capacity. Also provides a comfortable vertical grip with additional shutter release and scroll wheel for vertical shooting. With the included AA battery holder, users can also power the camera with 8 AA batteries.