Nikon EN-EL4a Rechargeable Li-ion Battery
These rechargeable batteries provide extended life and consistent power, even in colder conditions. Used together with your Nikon DSLR, the camera's fuel gauge displays the remaining charge and number of shots since the last charging.
The EN-EL4a is a rechargeable Li-ion battery providing 11.1v and 2450 mAh of power to select Nikon D-SLR cameras.
The battery is charged using the MH-21 or MH-22 chargers.
The camera's fuel gauge accurately displays the remaining charge and number of shots since the last charging of the EN-EL4a.
The EN-EL4a even gives notice when calibration is necessary.