These seven steps solved my Macbook battery drain problem.
I am using macOS Big Sur and the Mac reports:-
- Battery service recommended
- Battery capacity reduced
- Important battery message
- the battery's capacity is significantly reduced. to restore capacity, please check your service options.
- Mac using significant energy
- Please watch the upper ☝︎ video carefully and follow the steps. (in case the video doesn't work, press on this link)