It was the first 10% of the battery (so between 100 and 90%).
It is a battery I purchased last year in august 2022. So it has less than a year. I charge it every night until 100%. That maybe a wrong habit if I understood well.
The battery consumption has returned to normal since Sunday. I can’t figure out for which reason but the issue is gone.
Kudos for having such good performances after 2.5 year.
One way to reduce wear, via heat is to charge slowly when it is warm, in the summer for example.
The best ‘advice’ from studying reports and my own data is that a smaller range with most of that above 50% is the best, so (40% to 80%) for keeping wear down a bit (30% to 90%) for more use, but neither will help much if the battery gets warm. 20° to 30° is optimum. Lower temps require more force to charge and hence create heat, with a high temp it won’t take much to damage the battery so slow charging maybe from a non QC charger.
Still tis good to know yours has settled so thanks for the update.
The battery has a two year warranty so don’t worry about charging really.