I've got a Motorola Droid, and a cd player in my car that has a USB drive (which I usually use to plug in my thumbdrive to play MP3 music right off the thumb drive). Does anyone know if I can safely charge my Droid via the USB port in my car's stereo? It's an aftermarket stereo, Pioneer I belive it is. Will this harm either my phone or the stereo? Will it work? Or will it simply do nothing at all? Thanks!