Open settings
First open the settings-> Privacy.
Select diagnosis and dosage
Turn to the bottom to select diagnosis and dosage.
Confirm that automatic sending is selected.
Confirm that the automatic transmission is selected. If it is not selected, please select it and check it again this time tomorrow. If the selected automatic transmission time is more than one day, click Diagnostics and Dose Data.
Select the latest date log file.
There may be a lot of data in it, but it is sorted alphabetically. Turn to the beginning of L, find the log starting with log-aggregated, followed by the date, and select the log file with the latest date (these log files will be generated every day, but only when the automatic sending option is turned on, so if you don't open it, you will have to wait for one day).
View the maximum battery capacity
Click on the log file, turn to the bottom, stop when you see a bunch of TCP words, turn it up slowly and find com. Apple. snapshot.battery.maxcapacity (the bottom pile of TCP is snapshot). Look, the number below is the maximum capacity of the battery.