The super reliable and popular 400 mAh Preheat Cartridge Battery comes with a 10 second preheat function and variable voltage. Compatible with any 510 threaded cartridge on the market, the Preheat is the battery to beat.

It also works with the Wax Stick, a dual quartz coil concentrate attachment that screws on like any cartridge. 

Available in silver or black, and includes a 510 threaded charger.