I ran it exactly the same way I ran the several Mac laptops that preceded it: unplugged in cafes, unplugged in parks, and closed while plugged into the external

I ran it exactly the same way I ran the several Mac laptops that preceded it: unplugged in cafes, unplugged in parks, and closed while plugged into the external monitor on my desk. It’s rare for it to spend more than a couple days plugged in, even during the pandemic. The exact same usage pattern that produced a slow, multi-year decline in battery capacity in every other machine resulted in the 2016 Pro suddenly starting to shut down completely while it thought 20-60% of the battery capacity remained. SMC/PRAM resets did nothing, “recalibration” did nothing. 2016 Pros eat batteries, and while Apple acknowledged this enough to pay for one battery replacement, they’ve still hit me for an annoyingly large amount of repair cost, plus downtime, plus the annoyance of work lost due to unexpected shutdowns before I say “oh god it’s doing this again” and start getting insanely aggressive about saving.