This is the simplest way to see the health of your iPhone's battery. For a reminder, after 500 cycles, your battery is operating with roughly 80% of its full capacity*.
* According to this support article.
*And see our guide on how to get your Mac battery percentage back!
Make sure Share iPhone Analytics is toggled on.
Tap the "Analytics Data" option.
Scroll down until you reach the last file that begins with log-aggregated.
Drag the cursor down to the bottom and hold your finger there, it will eventually scroll very quickly.
Open the built-in Notes app and paste the contents of that file into it.
Click the action icon in the top right and then select Find in Note.
The number immediately following "BatteryCycleCount" is your cycle count!
Next, learn how to back up your iPhone.
The only real maintenance an Apple AirTag requires is the occasional battery change, and by occasional I mean about once a year. It's a very rare occurrence.
Dayne
