Upvote:3
It depends on the airline and possibly legal regulations in the countries you are flying in. Electric scooters or footbikes are usually powered with a lithium ion battery and this battery usually exceeds the capacity limits on lithium ion batteries both in cabin or checked luggage.
CityBug2, the first scooter you are linking to, e.g. has a 268.8Wh lithium battery. The FAA regulations (if applicable on the flight) only allows batteries up to 100Wh (cabin or checked) and in addition (but depending on airline policies) a limited number of batteries between 100 and 160Wh in cabin luggage. Batteries larger than 160Wh are generally prohibited. European airlines usually operate with the same limitations on flights in Europe.