Nikon MH-33 Battery Charger for Nikon EN-EL18d, EN-EL18c and EN-EL18b Batteries
NOTE: The USB-c cable you use must be of a high quality and must not be "data" only. In our experience the charger will "light up" when you use either a wall socket or laptop and so on from 2amp and higher.
You may also need to push the "Calibration" button to get the charger starter once the charger is connected to a power source and the battery is in place. If the lights don't turn green, push the Calibration button again.