You need to go to your local cell phone service provider and buy an attachment. This attachment will be a USB phone charger that will connect through your computer. Make sure that it is specifically for Razr phones and your correct service provider or it will not work and you will have wasted your money.
You need a USB phone charger (Phillips makes one with w/5 tips and it's white). "Google" a Razr V3 driver, download. Connect cord to phone, phone is detected, the charging begins. Wha-lah!
Download and install cingular connection manager software(includes drivers for razr phone) in to the pc and than use usb cable to charge phone through computer.
There should be a wire that came with the phone you hook it up to the computer and it should charge it. It should have come with your phone. Or you can go buy on from the place you bought it from.