Hi Chris,
I tried everything on this page but nothing fix the problem.
First I tried to empty the battery, I realized that the notebook once arrived at 0% could still hold even an hour.
This did not solve the problem, I still could not exceed 82% of charging.
Secondly I tried to reinitialize the factory settings in the BIOS several times but still nothing.
Finally I found that the level of charge always degrades,
At the beginning it was 82%, then 77% and now I can’t exceed 68% more.
The 68% of charge allows me to use the computer for 5-6h.
I think there is no way to fix that.