Detailed Description:
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.