You can replace the battery in your AirTag. Here's how.
Apple Support App: How to Download the App & Get Help from Apple
How to replace your AirTag battery
How to chat live with Apple Support on the web or your device
Apple introduces AirTag - Apple
Apple AirTags 101: Complete Guide For setup - GadgetMates
Apple Support App: How to Download the App & Get Help from Apple
How to remove and replace the battery in your AirTag — Apple Support
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Here's Why Your AirTag Battery Replacement Is Not Working - TidBITS
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How to remove and replace the battery in your AirTag — Apple Support
2 ways you can use Apple's AirTag with an Android phone - CNET