Smoktech eGo Passthrough 900 mah Battery
Smoketech's 900 mah black battery with a screw off bottom cap that reveals a mini USB port.
Plug in the included mini USB cord to the battery and the other end to your USB computer port and you have a direct charging battery.
Charge and vape at the same time.
How cool is that! Surf the site, watch YouTube videos all about vaping and never let that battery run down.