The Kanger E-smart USB Charger is designed to work with Kanger's E-smart 320mAh 510 battery.
To use, screw your Kanger E-smart battery onto the charger and plug into a USB port. The LED light will turn RED while the battery is charging and switch to GREEN once the battery is fully charged. Charging time for the E-smart 510 battery is ~2 hours.
To charge with a Wall Adapter (sold separately), plug the USB charge cable into the Wall Adapter, and then into a wall outlet.