The other night I turned off my Axim X51v and went to sleep. In the morning its back was hot and the battery was nearly empty. It charged up OK and has been running just fine til today, I pulled it out of the cradle on full charge, put it in its sleeve, went to lunch and then pulled it out a few hours later. It was hot on the back and nearly drained again. It needed a soft reset and there was an error message about being unable to execute notify.exe or similar. Come to think of it, the same thing including the error message came up the other day when I noticed the heat and drain in the morning.