If so, then the USB Passthrough is for you.  Simply plug the USB end of the cable into your computer or any other USB power source (battery pack, etc) and you can use your electronic cigarette all day without worrying about battery life.  The USB Passthrough is the solution to having a battery that last forever.  You never have to charge it, simply plug in and use.

Approximately a 5 1/2 foot cord.