At VapingZone we sell premium e-cig parts, including the latest e-cig batteries, too. At VapingZone you can buy eGo pass-through batteries, eGo batteries and 510 batteries. If you’re looking for a top-notch quality eGo e-cig battery, then the best e-cig battery for you is an eGo pass-through battery. An eGo pass-through battery for eGo e-cigarettes is available in many different battery capacities, colors, and configurations. If you’re looking for the best e-cig battery, you should definitely consider the eGo Pass-Through 900mAh USB battery which has a built in mini USP port for charging and a unique power saving and safety function of 5-click on/5-click off (lock-unlock) to prevent accidental discharge of your battery.