About a week and half ago I was using my Infuse with the Navigation dock while plugged in. I hadn't looked at the phone in awhile and I picked it up and there was a symbol of a battery with a warning sign and a temperature gauge on it, then it went off. Every since this it seems like my battery doesnt last very long. Before that I could get what I would call decent usage, almost all day with moderate use. Now if I use it some during the day (few webpages, facebook, text, etc..) i get nothing. Today I unplugged it at 7 am and now its 4:45 pm and I'm am showing 23% with 3 hrs 39 mins left (via Juice Plotter). Is there a way to check the health of the battery? Did I ruin it?