It is designed to be used with most 510 threaded cartridges and works with the Lookah 510 thread wax cartridges. The small size makes this pen-style battery discreet, and it sits comfortably in the palm of your hand. On the base of this 510 cartridge vape pen is a USB Type-C charging port. Connect any type C USB charger cable to this and attach the other end of the cable to a USB charging port.