I know the concept here is set it and forget it, but still: wouldn't it make more sense to have a smaller (but still probably larger than the current setup) rechargeable battery? I admit I haven't done any research on this, but the Magic Mouse/Keyboard seem to prove the concept of a rechargeable battery lasting months at least, and the Apple Watch proves the idea of wireless charging in a compact form factor, so it seems likely you could produce something that 1. Still roughly fits the AirTag physical profile (i.e. could be used as a dog tag, which this certainly could not) and lasts for months at least and is easily rechargeable. And again, I get that I'm making it require more maintenance rather than (effectively) zero maintenance with this product, but the wireless recharging makes that maintenance much less of a burden than sourcing and swapping a watch battery.
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