Have you ever run out of battery at the office or on business trips? Have you ever forgotten your cell phone charger at home? Here is the solution to your problem: the USB cell battery. Take off the back of your cell phone and expose the usb adaptor from your battery and just plug it in. You can now charge your phone from any laptop or desktop PC. You don’t have to carry with you a cell phone charger any more and never again will you run out of battery at the office.