Electric toothbrushes, shavers, etc are all fine in checked luggage and their batteries are many times larger. There's nothing wrong with batteries so long as they don't surpass a certain size.
That’s because for a period of time they were poorly manufactured and quite literally exploded. Since there were no real brands as they were imported before they became mainstream they just blanket banned them all.
If it's large enough they may pick it up - I wasn't allowed to board a flight once because they found a powerbank in my suitcase.
I got stopped at security and was shown my luggage. After removing the power bank it was all good, luggage was put onto plane and I was allowed to board.
Readit News
https://www.tsa.gov/travel/security-screening/whatcanibring/...
FAA says Apple AirTags are allowed in checked baggage
https://www.engadget.com/faa-apple-airtags-allowed-in-checke...
https://www.forbes.com/sites/suzannerowankelleher/2022/10/17...
They seem fine to take in checked luggage.
There have been other devices banned for similar reasons, like the Samsung Galaxy Note7: https://www.transportation.gov/briefing-room/dot-bans-all-sa...
If they detect something like that in your luggage, they will kindly ask you to take it in the cabin.
They never cared about CR2032 cells.
There are stricter rules however for spare batteries, including power banks. https://www.tsa.gov/travel/security-screening/whatcanibring/...
I got stopped at security and was shown my luggage. After removing the power bank it was all good, luggage was put onto plane and I was allowed to board.