I have the BatteryLife widget and it has an option to show the temperature of the battery (it may not be 100% scientifically accurate but I'm sure it's close). Usually my battery sits around 70 degrees when it's not being used. Last night I was talking on the phone for a little over an hour and I noticed it was getting pretty hot. After I ended the call I looked at the BatteryLife widget and noticed the temperature was at 107 degrees. Is it normal for a battery to get this hot after talking on the phone for just an hour?