How to check the battery capacity of iphone?

As we all know, the battery of a mobile phone will become more and more useless after being used for a long time, because its capacity will gradually become smaller. How do I know the remaining power of my iPhone battery? Let's take a look at the correct query method of the remaining battery power of iPhone.

1. Go to mobile phone settings-Privacy-Diagnosis and Dosage-Select automatic transmission (note: if you choose automatic transmission on the same day, you can only see it the next day);

2. Find the option of log-aggregated- latest date in the diagnosis and consumption data, and then open it (for example, 2 1 June)-turn the page to the bottom, and then slowly turn it up to find a < key> com. apple.snapshot.battery.maxcapacity <; /key & gt； & lt Integer & gt1800 < /integer & gt； 1800 here is the remaining power of my iPhone6.