DSTE Pro MB-D15 Vertical Battery Grip + EN-EL15 For Nikon D7100 D7200 SLR Digital Camera 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 six 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