Kaavie Exceptional magnesium alloy body Battery Grip for Nikon D810 / D800 / D800E / D800S Digital SLR Camera MB-D12 It 's the perfect replacement for the original Nikon MB-D12. One Li-ion Battery EN-EL15, as well as normal 8pcs AA batteries can be used with this battery grip. Effectively doubling your shooting time,Vertical firing release with lock Professional high quality battery grip. One and only battery grip made by Exceptional magnesium alloy body!!!! Vertical shutter,Significantly improves stability.Dramatically improves stability