AirTag battery replacement: you can use some bitterant coatings

How to Replace the Battery in Your AirTag (and Make Sure It Works) : r/apple

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Apple Warns Against AirTags Replacement Battery with Bitter Coating: It Might Not Work Well with Tech

How to alter the AirTag battery

How to Change an AirTag Battery

Panasonic AirTag Battery Kit, Size CR2032 with Bitterant Coating-Removing Wipe, Apple-Approved OEM Replacement for AirTag : Electronics

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AirTag Battery Replacement — Apple Says Avoid These Batteries