Mac Book Pro M1 Battery issue

[Pipinou83]

Lately I have noticed that the battery of my MacBook Pro M1 (1 year/100 cycles) does not hold more than 4/5 hours when it can easily go up to 20 hours. I was not even using Zoom or any other application likely to drain the battery. The software is updated and I often use "Clean my Mac". According to my Mac, the battery health is at 93%.

Any clue of what is going wrong ?

Thanks in advance !

 

[Sanpete]

What does Activity Monitor show is using energy? (There have been some indications that Clean My Mac can cause Spotlight indexing to operate when it shouldn't have to. That can drain a battery.)