I just got this fixed on my end, have had the 255% issue for a couple of days now.
- Powered down the PC and held the power button down for 30 seconds.
- Removed the battery and restarted the computer.
- Let the computer boot back up and everything loaded.
- Re inserted the battery while the PC was still on and running. It immediately started charging and the 255% went away. Have restarted multiple times and its still fixed.
Hope it helps.