The thinking I've seen is about batteries being replaced by explosives.
Even so, the US isn't the first to do this. China won't let you take Li+ batteries beyond a certain mAH in your carryon.
Even so, the US isn't the first to do this. China won't let you take Li+ batteries beyond a certain mAH in your carryon.
The US already has energy limits for batteries in carry-ons[1], they're just not so boneheaded as to preclude laptops.
[1]: https://www.faa.gov/about/office_org/headquarters_offices/as...
Various airlines and countries also had limits for years now. 100Wh seems to be a common number.