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Laptop battery size has historically been limited in high performance machines by the FAA with 100Wh. I guess you could build a MacBook Air type device with insane battery life nowadays though.

Does the rest of the world have similar rules or is this a case of manufacturers aiming for the largest possible compatible market, as a sort of Brussels Effect but in a shitty least common denominator way?

There is an global IATA regulation with the same limit I don’t know which was first

I wonder what the economic reason for that would be, assuming that such a battery exists.

"But look how thin it is!"

"So think I think I can actually bend i- oh shit."