[sakisv]

Personal anecdata:

- Work MPB which I got 2021-12, 99% of the time plugged in because I was WFH, last time I unplugged it to return it to my employer, the battery was at ~95% of max capacity (as reported by MacOS)

- Personal MBP bought 2021-12, only plugging in when battery was low, and 1.5y later the battery was at 80% of max capacity

It was then that I investigated a bit and learned the trick of charging only up to 80%, which is something that MacOS does automatically when it's constantly plugged in which preserves battery life.

Since then, my personal laptop also stays plugged in most of the time, its battery is almost always at 80% and the battery hasn't decayed further.

[concinds]

Another anecdote:

- 2012 MBP used by my parents, almost always plugged in. Battery died last year. Forgot the cycle count but it shocked me by how low it was. This was before they implemented the feature where it stops charging at 80%.

- 2015 MBP used by me, mostly plugged in for the first few years, then afterwards always on battery, at least one charge/discharge cycle every day (often more than one). Battery died 2 years ago (and was 3 years younger). Cycle count was something crazy like ~2000.

If your laptop is near power, plug it in.