Nikon MH-63 Battery Charger.
It is designed specifically to charge EN-EL10 rechargeable lithium-ion batteries.
The charger is compatible with various Nikon Coolpix digital camera models, including the S210, S220, S500, and S3000 series.
The input voltage is 100-240V, making it suitable for international use, with an output of 4.2V.