A free replacement for macOS’ battery status indicator, with a lot of functionality. Runs on both macOS Catalina and Big Sur.
Wattagio
Watts
Watts reminds you to do all the right things for your battery, like doing an initial battery calibration when you get a new battery, then re-calibrating it on occasion.
Wimoweh
With Wimoweh you have better control over how your Mac sleeps. The app comes in handy when you’re waiting for a lengthy job to finish and want your Mac to sleep afterwards.