How Do You Charge Your Xbox 360 Controller Rechargeable Battery Without Having To Play Your Xbox?

I just got a rechargeable battery pack 4 my xbox 360 controller, and it says to charge it for some time before you use it for the fist time. How do you charge it without having to play on your xbox?

Tagged as: Battery, Charge, controller, Having, play, Rechargeable, Without, XBOX, your