The seats are assigned. People have been standing in line for 15 minutes now. Why on earth would anyone want to stand there, when they could just sit and wait until the line clears?
I understand wanting to get off a plane ASAP, but boarding? You just end up sitting on the plane, waiting for everyone else to get on.
That’s only for cabin luggage. In checked luggage, Lithium Ion batteries are completely banned. If a battery bursts into flames in the cabin, it can be handled with hopefully minimal damage. You do not want that to happen in the belly of the plane packed in closely between everyone else’s luggage with no way of getting it contained until the planes lands.
Well no because it depends on the airline.
I just checked an airline (Lufthansa) and they allow it for checked luggage up to 100Wh though do not recommend it.
Anything 100-160wh requires a permit from Lufthansa.
Interesting, that seems kinda unsafe to me. The one I checked was Ryanair, they fully prohibit batteries in checked luggage