EN-EL4a/EN-EL4 Battery Charger and Battery for Nikon MH-21 D3 D3x Extra power for your digital video camera / camcorder Smart LED charging status indicator.(Red: Charging, Green: Fully Charged) AC Desktop Wall Charger Input: AC 100 ~ 240 High capacity / rechargeable Li-ion Battery with premium cell The charger is for charging your battery only. It does not work as AC adapter for your camcorder or camera,please do not plug the charger into your camcorder or camera