Cannastick Passthrough USB Battery - 650mAh The 650 mAh Cannastick Passthrough Battery is the ultimate addition to any one of our vaporizer pen attachments. This battery allows users a convenient option for using their ecig or portable vaporizer consistently throughout the day at their office or in the car – anywhere they can connect to a powered USB connection. This battery also includes short circuit protection, 510 universal threading and color LED battery-level notifications. Get the best of both worlds as well by recharging as you vape. While the battery is connected to a powered USB port through the built-in micro USB port and included Micro USB charging cable.