官网 FAQ 有解释
Help, my battery capacity dropped and my MacBook turns off with 50% battery left or stays at 100% for hours!?
Keeping your battery at a lower percentage, such as under 80%, over weeks without doing full cycles (100%-0%-100%) can result in a disturbed battery calibration. When this happens, your Macbook might turn off with 40-50% left or it will stay at 100% for hours, and your battery capacity can drop significantly. However, this is only due to a disturbed battery calibration and not because of a faulty or degraded battery. To avoid this issue, we recommend doing at least one full cycle (0%-100%) every two weeks. Even if your battery calibration gets disturbed, doing 4-5 full cycles will recalibrate your battery and the capacity will go up again. AlDente Pro has a feature called Calibration Mode(
https://apphousekitchen.com/feature-explanation-calibration-mode-2/), which will automatically do a full cycle when started. You can read more about the calibration of “smart” batteries here:
https://batteryuniversity.com/article/bu-603-how-to-calibrate-a-smart-battery