Cartisan Black Box
The search for a discreet and easy-to-carry 510 battery stops here! The Cartisan Black Box is the perfect companion to have and fits every 510 threaded cartridges. Each device comes built-in with 3 different variable voltage settings to give you the exact performance and power you are looking for. This device is very easy to use, simply click the button 5 times to power and on and off, and click 3 times to adjust the voltage settings.