Friday evening I was driving to Myrtle Beach, SC and needed to use the navigation app. I started up Sprint Navigation and noticed my battery was just below 50% and knowing I still had 2 1/2 hours to go I plugged in a charger. After about an hour I noticed the notification light was alternating between amber and green. I looked around for a notification (and found none) but noticed the HTC battery widget was no longer "percolating". I started the app and had a "Battery Overheat" message. Now I am finding that after my phone charges it is draing while asleep at a rate of about 10% every 1/2 hour. I have checked battery usage and it shows Cellular Standby at about 48%, Phone Idle at about 45% and Display at 7%. Is it possible that the battery is terminally damaged? The HTC battery widget shows the battery health as Healthy.