Note: This article was first published on 30 July 2021.
The Apple AirTag uses a single CR2032 battery.
If you're replacing the battery of your AirTag sometime next year, do not get one with a bitter coating.
In its support document on replacing battery for the AirTag, Apple cautions that CR2032 batteries with bitter coatings may not work with the AirTag or other battery-powered products, depending on the alignment of the coating in relation to the battery contacts.
Some battery makers use a bitter coating on their CR2032 batteries to prevent children from swallowing them. The non-toxic bitter coating is designed to react with saliva and release a bitter taste to discourage swallowing.
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