Car charger for BB Tour


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??