Bower XPDNEL4 Digital Camera Battery for Nikon EN-EL4 D2H, D2X, D2Hs, D3, D3S, D3X (Gray) Rechargeable Li-ion replacement battery for the Nikon EN-EL4 11.1V and 2600 mAh 100% memory-free for full charge at any battery level Fully compatible with Nikon MH-21a original battery charger Designed for Nikon D2H & D2Hs DSLRs