I've searched and searched but still cannot find a precise answer. I bought a powerjolt 2.1 amp car charger from amazon, since I've had it I've noticed it takes forever for the phone to charge! (37% to 67% in 2 hours and it was on stand-by the entire time) So after doing some research I found that the phone is charging in usb mode which has a max of 500ma. So my question is, could this be fixed with a different usb cord? Or is there a way to force the phone while charging, to "ac" vs "usb"? I have also tried a friends 1amp belkin charger with the same result. And I have used the stock usb cable and 2 different aftermarket cables. Im clueless at this point! I did just buy a charge only usb cable from amazon.. not sure if that will make a difference or not since it doesn't transfer data. Anyway any help would be much appreciated! Thanks in advance!