I have two aftermarket usb data cables. BOTH work fine on the indoor AC charger that came from Verizon. Both charge the phone when connected to the stock Motorola AC charger. BUT neither will charge the phone when plugged into the aftermarket 12V-USB charger IF THE PHONE IS TURNED ON. But if the phone is turned off they charge the phone as the green LED on the upper left lights up solid. It immediately goes out if I boot the phone. Any ideas how to cure this without paying $40 for a Motorola in car charger? One solution I am considering is getting a small AC inverter to run on the cars 12V and using the AC charger from the house, but this is a Rube Goldberg solution and I would prefer knowing what I have to modify to make the 12V-USB to work ALL THE TIME.