The XTAR PB2 charger is a slimline lithium-ion 18650 battery charger, that also doubles up as a power bank. The PB2 will act as a normal vape charger and it will recharge your 18650 batteries but it will also double as a fully functional power bank. As a charger, you will receive all of the great protection features including temperature control, reverse polarity protection, and more. To remove or insert the next set of batteries, easily take off the magnetic cover and swap out the battery cells.