https://www.getbatterybox.com/batterydesk/is-it-bad-to-keep-macbook-plugged-in-all-day-to-charger> The charge extremes can vary, but typically they are between 0% - 20%, and 90% - 100%. This means that when a MacBook battery is between those ranges of percentages, it will degrade faster than normal.
所以楼主你是对的,电量过饱或者过低都不好
> Will my battery overcharge if left plugged in?
> The harm doesn't come from overcharging the battery. This does not happen as the battery controller chip inside of the MacBook Pro and Air are intelligent, and stop the battery from charging past the overcharging safety threshold.
但是楼主的这种做法也是没必要的。充满了后电池控制程序会自动停止充电。