I can't recommend Al Dente enough. Apparently I'm only at 134 cycles with 92% capacity*. M1 max is 26 months old. I have used a work computer for large portions of time obviously.

* TBH the capacity seems a bit low for my cycle count. Possible I've let it sit around 30% for too long at points. Such is the scourge of living in San Diego with the highest kWH rates in the country and only trying to charge at night or on weekends. I cry inside when I see people quoting 12c/kWh. Try 50c-1.20 depending on time of day/year.

Isn’t that option built into MacOS now? Since Ventura I think.

It has a supposedly intelligent thing which works about the same as iOS, meaning not well and not reliably.

iOS has gained a hard limit toggle, but macOS has yet to. Aldente does that job.

The built-in option is a step in the right direction, but doesn't provide any way for a user to specify that the battery doesn't need to be charged to 100% if the OS thinks it needs to be. In my experience, it usually ends up charging the battery 100% every night, then letting it discharge to 80% during the day.

I’ve had it never charge, and sit reliably at 80% for weeks. Then when I unplugged it the schedule was ruined and it reverted to charging at night. Overcomplicated for no reason lol

Yes: the MacBook eventually learns to stop charging and keep at 80%. (it took a month for mine)

You can override it to fully charge.