[layer8]

I don’t think this is about transmission. Rather, it is probably to reduce the risk of thermal runaway of lithium batteries, which can cause fire and explosion.

The regulation also states that such devices “should be carried as carry-on baggage”, that is, in preference to checked baggage, presumably so that the devices are less prone to damage, and cases of malfunction and fire will be more quickly detected.

[RC_ITR]

Sure. But to that end, are button batteries known to be susceptible to thermal runway?

[layer8]

See for example here: https://safetyfirst.airbus.com/lithium-batteries-safe-to-fly...

[Hnrobert42]

That article, while interesting, does not address button batteries. Maybe I missed it. I found it interesting that you can ship any amount of lithium batteries as cargo.

[hulitu]

Button batteries are a different type. They don't overheat when shorted.

[samatman]

Anything which has energy overheats when shorted.

I upvoted you anyway, because by design, button cells have limited potential to cause damage when they short. Yes, they heat up, but they have very little energy to begin with, and a large amount of metal surface area which keeps thermal runaway in check.

[RC_ITR]

Thank you for answering my question 4 layers below where I asked it.

Funny how the “don’t ask a question online, be confidently wrong” principle applies here so perfectly. I love it.

[LorenPechtel]

All current *rechargeable* lithium chemistries are an issue, single-use is not. Air-Tags aren't going to start a fire.

[ugjka]

Air tags don't have lithium batteries

[cromka]

Did you bother to check? AirTags doesn't have any battery by itself, they use replaceable CR2032, which are most commonly lithium. Although alkaline alternatives exist.

[ugjka]

My bad :(