Cabana Cannabis Co batteries are the ultimate in chill. These 510 threaded batteries are compatible with the majority of pre-filled or refillable cartridges. They feature tropical designs and variable voltage for a truly customized experience. The Cabana Cannabis Co. battery is a 320mAh battery, so you can enjoy puffing all day before recharging. Turn it on and off by quickly pressing the button 5 times, hold it down to draw. Preheat by pressing button 2 times to allow battery to continuously heat for 15 seconds. Switch temperature by twisting the bottom of the battery. Adjust the voltage between 2.0 and 4.0V depending on the type of material in your cartridge. The included USB smart charger allows the device to specify the exact amount of current it requires and disconnects power once fully charged. The smart USB rapid charge provides a fast charge without requiring a wall block and the auto-shutoff prevents overheating during use.