KangerTech 650mah EVOD passthrough is upgraded EVOD Battery with a USB charging port on the end. The USB port allows the Kanger EVOD passthrough to work nonstop while connecting with power supply through a USB cord. Like the Kanger EVOD battery, Each Kanger EVOD passthrough also has 3.7V constant output voltage, which makes sure its constant performance no matter if it's fully charged or not. The battery's button has a 5-click On/Off lock the same as eGo C batteries. Please press the button 5 clicks within 2 seconds to switch between the ON/OFF mode. Some of the Best matches: Kanger Mini Protank-2, Vision V3 Single Coil & Vision V3+ Dual Coil Clearomizer and the Kanger eVod Bottom Coil and many more! Brand:KangerTech Unit:1pc Passthrough Size:Length 3.74" (95mm); Diameter .55" (14mm) Passthrough Output Voltage:3.7v USB Charging Cord Length: 13.7" (350mm) Battery Capacity:650mAh Button LED:White USB Port LED:Red Threading:510/eGo How to Use? *Screw off the bottom cap *Insert the USB charging cord into the bottom of the passthrough and connect to a USB port on computer. *Or detach the USB charging port and use the battery separately. Note: * Each passthrough comes with 1pc 13.7" (350mm) USB cord. * Please charge the battery with the USB charging cord on a computer or an AC-USB adapter or Car-USB adapter. * You can also charge the passthrough with a 420ma eGo Fast USB charger or Kanger 500ma USB charger. Warranty: 30 days from date of delivery.