High i just bought a TomTom 540s. It came with a car charger and a USB charger for the computer. BUT no wall charger. I looked at the output on the car charger, and it is 5V, 1.2A. And the Motorola charger had an output of 5V, 850mA. Is 1.2A the same as 850mA. Can i use the Motorola charger on my TomTom? Because i dont what to fry my TomTom.