Rechargeable stainless steel push button battery.
Includes USB charger.
For use with 510 universal thread cartridges only.
Battery produces 3.8 – 4.2v and 350mAh
Screw on your favorite cartidge, push the button once and take a slow hit. Repeat as needed.
If the battery is fully charged, a cartridge is loaded, and the light does NOT come on, then press the power button (5) times fast.