The Wulf Mods LUX Cartridge Battery 9pk by Wulf Mods is a luxury, feature-packed, and convenient device. The LUX incorporates durable alloy body construction, making it resilient against accidental falls. Powered by a 400 mAh battery, the LUX features adjustable voltage from 1.8volts to 4.2 volts, allowing users to pick their preference of temperature. It also has a 10 second preheat mode that heats the cartridge to be ready for use. Additionally, a 15-second safety cut-off feature conserves the battery. Finally, the power from the battery to the coil is automatically shut down, preventing the device from overheating or misfiring.