i have the same problem, with two droid x phones. we tested the charging cord, tried the charger in multiple cars, and just cannot get a charge to the phone on a car charger. We ARE able to charge both phones in a wall outlet. I have this theory Verizon doesnt want us to use the streaming data (Pandora, or Navigate, for example) and forces the battery to die when in the car. I am really frustrated. Any ideas anyone??