Click "Settings" in the lower right corner of the phone.
Click Privacy.
Click "Diagnosis and Dosage".
Apple's mobile phone can help Apple improve its products and services by automatically sending diagnostic and usage data, including battery information, every day.
Ordinary mobile phones turn off the automatic sending function. Now click "Auto Send" to turn on this function.
Return to this page one day later and click "Diagnosis and Dose Data".
Find the log file of "Log-Summary-Latest Date" and click View.
Then we found this line of data in the pop-up log:
“& ltkey & gtcom . apple . snapshot . battery . max capacity & lt； /key & gt；
& lt integer & gt xxxx & lt/integer > ",
There is a lot of data in the log, so it is recommended to start from the bottom. This line of data is basically at the bottom of the page
& lt integer & gt xxxx & lt/integer > The data in the middle is the maximum capacity of our current battery.
You can also download third-party software from your computer, such as iBackupBot for iTunes or Itools. After connecting the mobile phone and the computer with the data cable, you can directly check the battery capacity, cycle times and health status of the iPhone.
One of the important performance indicators of battery performance is battery capacity, which indicates the amount of electricity released by the battery under certain conditions (discharge rate, temperature, termination voltage, etc.). (JS- 150D can be used for discharge test), that is, the battery capacity, usually in ampere hours (abbreviated as A h, 1A h = 3600c).
Battery capacity is divided into actual capacity and battery capacity according to different situations. Theoretical capacity and rated capacity.
Capacity C= discharge current (constant current) I× discharge time (hours) t.
Discharge time T= capacity C/ discharge current (constant current) i.
Discharge current (constant current) I= capacity C/ discharge time t.