Thought I had gotten a bad batch of batteries because no matter what I did, I couldn’t get an AirTag back online after a replacement.
Turns out, the bitter coating seems to be preventing proper contact in the AirTag. Cleaning the battery off with an alcohol swab solved the problem immediately for me and my AirTag came right back online.
So do Nintendo Switch game cartridges. They are also small and prone to a toddler making them a snack. You can try this at home, give one a kick lick and you’ll see they aren’t pleasant.
Edit: kicking or licking toddlers not recommended
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I just licked a cartridge and I regret everything.