The included wall adapter is 1A output, versus the typical 850mA on a lot of wall/car adapters I've seen. That definitely helps. It's (unsurprisingly) pretty slow to charge when plugged into a 500mA USB port on a computer.
@ultra yes i'm sure they will. i ignorantly use DROID when i mean Android.
@rad it even charges quickly when on other wall chargers and the car charger. its awesome. even if my battery drains fast it charges just as fast. love it