White the AC adapter you can connect any USB charger to be able to charge your batteries from a wall outlet. The USB charger is purchased separately.
How to charge your battery in the AC adapter:
1. Plug in a USB charger into the AC adapter.
2. Remove the evaporator from the battery.
3. Screw the battery into the USB charger, plug the AC adapter into a wall outlet.
4. Charge the battery as prescribed length.
5. When the battery is fully charged, re-assemble the e-cigarette.