Review

Nikon Battery charger   MH-21

can be used to recharge and calibrate EN-EL4/EN-EL4a batteries.

It can fully recharge an exhausted EN-EL4/EN-EL4a battery in about 100 minutes.

Cameras

•  Nikon D2H
•  Nikon D2Hs
•  Nikon D2X
•  Nikon D2Xs