This USB charging cable is for the EVOD series electronic cigarettes. Simply screw one end onto your Ego type battery and plug the other end into your computer to charge. Red light indicates that chargeis in progress. Green light indicates charge is complete. This genuine Kanger eVod USB Charger can be used with an array of compatible batteries, such as the Kanger eVod and eSmart lines, as well as the Joyetech eGo lines. It is capable of charging the majority of eGo-size stick batteries on the market.