DSTE Pro MB-D12 Vertical Battery Grip for Nikon D800 D810 D800E D800S D810A SLR Digital Camera as EN-EL15 A firm, comfortable grip for vertical-position shooting with the Camera. Buttons and controls are conveniently placed and easy to reach for greater comfort. Holds one Li-ion batteries or eight AA Battery for extended shooting The rugged, but lightweight, body design has gasket-sealed controls to resist dust. When using two batteries, the grip will automatically switch to the second battery if the first becomes depleted. Switching does not interrupt camera operation. Remaining power indicator