Nikon EN-EL4a Rechargeable Li-ion Battery for D2H D2HS D2X D2XS D3 D3S D3X D300 and D300S from Nikon

- The EN-EL4a is a rechargeable Li-ion battery providing 11.1v and 2500 mAh of power to select Nikon D-SLR cameras.
- The battery is charged using the MH-21 or MH-22 chargers.