Yesterday, I was using Sprint Navigation with my Hero charging in the car. After awhile, the LED starts flashing a pattern <amber> <amber> <green>. It seemed as if the flashing started about the time the phone would have been fully charged, but that is just a guess. The phone seemed warm (it was in the sun up on the front windshield) so I disconnected the charger and the flashing stopped. I restarted the phone, plugged the charger back in (the LED went to amber) and after about 10 minutes, it started flashing again, same pattern. I disconnected the charger again, flashing stopped and just left the charger off. The phone continued to work, nothing unusual was going on with performance. I charged it at home and it went from amber to green, no problems. So, does anyone know what the flashing patterns indicate? Is there documentation somewhere that shows what the patterns mean? What it was trying to tell me? Battery problem, charger issue, phone explosion imminent?