What is the proper charger rating for a Motorola RAZR V3x?

defunctzombie

New member
I had a black V3x that I broke. So I got a new orange one, same model. I was using the old charger, and also a USB cord to charge it through the computer. I just happened to look at the charger that came with the phone, and it outputs 5 volts/850 mAmps. The other charger is 5 volts 550 mAmps and I have no clue what the USB puts out. Which one should I use?
 
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