The Ccell Palm Pro Vaporizer Battery contains a 500mAh battery and three voltage levels (2.8/3.2/3.6V) for different forms of vaping. It also features a preheat function for vaping at a cooler temperature. The CCELL Palm Pro is a multi-purpose palm-fitting 510 battery that provides more consistent vaping performance than standard batteries. It is robust and light, with a sleek, ergonomic design. The device is compatible with the vast majority of 510-threaded cartridges.