This rechargeable 1000mAh battery is compatible with all standard 510 thread cartridges. It is designed with a button for control, which can be used to adjust the heat settings. Higher heat means more potent hits but a shorter life cycle for your cartridge, while lower heat means smaller and more flavorful hits. To use: Press the button 5 times to turn the battery on/off. Press the button 2 times to preheat your cartridge for 15 seconds when you first attach it; press 1 time to stop it early. Press the button 3 times to switch between heat settings.USB charger included.

Disclaimer: Due to compliance reasons, we cannot accept returns or exchanges unless the product is defective.