So far I haven't found anything about 100Wh, only that anything with batteries larger than a laptop is not allowed.
Even given that they would allow the batteries, it would have to go as checked luggage, no? And it probably won't easily fit in most luggages…
A friend of mine traveled a few times with a penny board, much smaller and lighter than a scooter, and it got confiscated at security.
Airports would be so much more fun on a scooter