Usage: First get the "battery life" and add it to the shortcut command App. On the "Privacy-Analysis and Improvement" page of iPhone, open "* * * Enjoy iPhone Analysis". After the iPhone is turned on, it will store the system log of battery information, and it will take several days for the log to appear after the first boot. Enter the "Analyze Data" interface and find the log file containing battery information. IOS 16 system and iOS 15 and the following systems use different files: iOS 16.