I bought a generic car charger for my Droid. My thought was something along the lines of "a micro USB charger is a micro USB charger" and clearly I was wrong. I noticed that after an hour on the charger while i was using GPS, 3G and Bluetooth, that the charge on my phone had actually dropped by about 10%. At best, the generic charger only slowed the drain from the battery. I replaced it with a Rocketfish charger from Best Buy and, while charging was painfully slow, it did charge. Maybe it was the brand of charger and maybe my charger was faulty but I thought I'd throw this out there for anyone who is going to grab one.