Does anyone know the exact power requirements to charge the Tab using an automotive power outlet? I purchased a Kensington 3.1 amp power plug for using in a vehicle power outlet. It has 1 2.1 amp usb port and 1 1 amp usb port. Neither port will charge the Tab. I even tried using a charge only adapter for usb that has the data line clipped so it wont try to mount as a hard drive. No dice. The power plug I purchased says it is compatible with an iPad so I thought it would have the right amps. VZW says theirs is compatible but they never have it in stock. I really want to have a power plug that essentialy changes your power outlet into a USB port rather than buying another plug in specific charger.