For some reason, my battery dropped to about 58% this morning. Noticed that the service in the building I was in was only 1X. Could that cause excessive battery usage? Anyway, now I've got the phone plugged into a usb charger (Motorola 5.1v, 850 ma) and it hasn't budged from the 58% in two hours. The phone says it's charging, but I'm not seeing any change.