Apple 13pro upgrade ios 15.7 battery off.

The first trick: find out the "culprit" of power consumption. Because there may be compatibility problems between the software and the system after upgrading iOS 15, we should first check whether there is abnormal power consumption in third-party apps. In the settings-battery, you can see the power consumption ranking of each App in the past period of time, as well as the time spent in the foreground and background. If the power of an App is abnormal, then the battery is not durable, and it is likely to be "playing tricks". If there is no abnormal power consumption, then I suggest you check to see if the battery health has dropped significantly.

The second measure: turn off the automatic refresh of the background App. Generally speaking, there is a "background application refresh" option. Applications that do not need background refresh can be selectively closed. After closing, these apps can't secretly update data automatically in the background, which saves electricity and traffic.

The third measure: closing the notification screen has always been a big power consumer. Although the short-term switch of the screen has little effect on battery life, if you have hundreds of notifications every day, each notification screen will be turned on and off once, which will have a great impact on battery life. So I suggest you selectively turn off some unimportant notifications.