Just few minutes back it was displaying all the things like display, music, etc using the battery. Now its just the Android OS? Restarted the device twice, but in vain! Help appreciated. Thanks.
I"ve seen this happen a couple of times when a device encountered an error and restarted on it's own. If you charge it to 100%, then unplug, all the stats should reset and get back to normal.
Mine did that for 2 days and then went back to normal. I don't remember if GSam gave good readings at the time or not. You can try an app like that to see if it give accurate readings.