Mine is also an N810. It probably would have helped to mention that. I had not considered the charger, since I'm seeing it with all three of my chargers (home, work, and travel). I've been looking around for a battery, but i haven't found one locally, so I haven't challenged that either. I thought it might be related to the Advanced-Power app except: 1) no one else is complaining and 2) I uninstalled it ~24 hours ago and I'm still having the problem.