Last evening after limited use my droid showed that the charge in my battery had diminished to the point of it being "red" and suggested that I connect it to the charger. I did not have the charger at work so I merely shut the phone off. About an hour or so later I thought I would turn it back on and check to see if I had any missed calls or messages. When the phone rebooted it showed that it was about completely charged ! and remained that way the rest of the night. Is it common for the battery to regain a charge after " resting" ?