Compatible with 510 cartridges only. The Hunny Pot 510 battery comes with a USB charger included. 320 mAh capacity = ~300 uses per charge Usage 3 heat settings;White: Low 2.8VBlue: Medium 3.2VRed: High 3.6V Charge before useWhen ready to use, press and hold the button and inhale through the mouthpiece.Remove cartridge & turn off when not in use Button Settings 5 X Turn On/Off3 X To alternate between the 3 heat settings 2 X Pre-heating 1 X Quit pre-heating