4 ms·The older batteries were rated for 500 cycles so that doesn’t seem unusual.by alphabettsy 4y agoThe older batteries were rated for 500 cycles so that doesn’t seem unusual.rahkiin 4y agoExcept 80% is regarded as pretty much EOL, and this is a 2017 model.fomine3 4y agoApple is too late to implement battery protection feature (limit max charging%) for always AC connected machine. It's implemented in 2019 meanwhile 2000s ThinkPads supported that.