For those of you who love stick 510 batteries but want the protection and discretion of a concealer this ALL NEW FOR 2022 Beekeeper Stick is for you. 510 Cartridge BatteryHigh capacity 510 cartridge battery with 500 MAH of power so you have plenty of battery life for days or on the go, you have 4 great power settings, and a 2-stage preheat functionality that not only runs low volts through the cartridge but actually heats the cartridge chamber in 360 from the outside to make sure you never take a dry hit. This unit functions off of a 510 magnet adapter and fits most prefilled 510 thread carts that fall into the 9-11MM in diameter range. Offering the style of a stick battery but the protection and convenience of a concealer this battery feels like a high-quality compact flashlight or writing instrument. It has a micro USB charging port for your convenience and is styled in our brand colors and engraved HoneyStick elegantly on the chamber. This pen provides performance, power, convenience discretion, and protection all with traditional style and added discretion in one amazing battery. We know you will enjoy this Beekeeper Stick!