机器型号及设置
2018 款 MacBook Pro 13 寸,macOS v10.15.7 。

设置、节能、电池健康、电池健康管理为打开状态。
现象
上周升级到了 macOS v10.15.7,周五盒盖放着,周六周日两天放着未使用。
周一打开,电量 50%-60%之间,接上电源,因为当时提示未在充电,还特意看了下,电池状态为正常。
之后电池电量一直持续下降,当中多次命令行查看电池状态。
ioreg -rn AppleSmartBattery | grep -i capacity
倒数第二次
"AppleRawCurrentCapacity" = 11
"AppleRawMaxCapacity" = 4419
"MaxCapacity" = 4419
"CurrentCapacity" = 11
"LegacyBatteryInfo" = {"Amperage"=18446744073709550569,
"Flags"=5,
"Capacity"=4419,
"Current"=11,
"Voltage"=10500,
"Cycle Count"=312}
"DesignCapacity" = 5088
"BatteryData" = {"StateOfCharge"=1,
"PMUConfigured"=1528,
"Voltage"=10541,
"QmaxCell1"=5093,
"AdapterPower"=982685254,
"SystemPower"=1094616315,
"ResScale"=117,
"QmaxCell2"=4932,
"QmaxCell0"=4985,
"CycleCount"=312,
"DesignCapacity"=5088}
最后一次
"AppleRawCurrentCapacity" = 0
"AppleRawMaxCapacity" = 4432
"MaxCapacity" = 4432
"CurrentCapacity" = 0
"LegacyBatteryInfo" = {"Amperage"=18446744073709550570,
"Flags"=5,
"Capacity"=4432,
"Current"=0,
"Voltage"=10443,
"Cycle Count"=312}
"DesignCapacity" = 5088
"BatteryData" = {"StateOfCharge"=0,
"PMUConfigured"=1528,
"Voltage"=10424,
"QmaxCell1"=5093,
"AdapterPower"=1015541310,
"SystemPower"=1092802811,
"ResScale"=117,
"QmaxCell2"=4932,
"QmaxCell0"=4985,
"CycleCount"=312,
"DesignCapacity"=5088}
电池放电过程中,没有运行过大负荷的应用,但是很奇怪的 CPU 占用率有一会儿非常高。

电池电量耗尽后,一直没有自动充电,而是黑屏了,然后按了键盘后,大约是自动重启了,之前的编辑文档内容丢失。
为什么怀疑 macOS 10.15.7
电池健康管理打开也有挺长时间了,这次的现象是首次出现,而上周刚刚更新到了这个版本。