Open one of your iPad’s analytics files (these files start with “Analytics” followed by a date). In the analytics file, tap the Share button in the upper right-hand corner of the screen. The Siri ...

You can check the health of your iPhone's battery to determine when it's time for a replacement.

To check your iPad's battery health, you'll need to install a third-party app, which will require you to connect the iPad to a computer.

Is it OK to check your phone’s power bank Can you charge your tablet in the overhead bin? What about a cordless hair dryer?

Each battery cell is equipped with a small chip that tracks detailed performance data, including temperature, charge cycles, and overall health. This data is stored in a secure digital “battery ...