When I open the "Battery use" screen it says that the phone is on battery for 14663d 4h 34m 53s, which is clearly wrong. The graph shows a linearly descending line. What is the problem? Why does the phone display these values? As far as I can tell the feature has been working correctly so far.
I have tried restarting the phone (I've removed the battery for a short time too). The phone is a Samsung Galaxy S Plus with firmware version 2.3.5.