I was warned by Verizon not to buy a droid car charger ($3.99, instead of Verizon's for $29.99)) on the internet because it could disable the phone if it was defective. I saw an ad on the website for this forum offering Motorola droid car chargers (also $3.99), which I thought would be safe, but when it came it's made by grabit and doesn't say Motorola on it. Is it safe? Am I risking my Droid by saving a few bucks?