When I fly:
-battery is in carry on luggage -Discharged (marked), removed, and stowed in fire proof battery transport pouch (http://onewheel.wiki/Air_travel) Including all the spec paperwork y photo of the MH capacity of the battery (http://onewheel.wiki/Air_travel) When I go through security I pull the battery out and set it in it's own bin. I do leave it in the fire proof pouch, with the paper work.
-Onewheel-is checked in a camera equipment case (http://onewheel.wiki/Air_travel). tire deflated (pushed in a bit for a visual), tape marked "no air" in english, and in the language where I am going. Also, Tape marked "no battery" in English, and in the language where I am going. Spec paperwork included (http://onewheel.wiki/Air_travel).
When I can i do keep someone close, but that is not always the case.
Let's keep this thread going. I too want to know the ease of pulling the battery on the pint. Would be nice to see one.
I will add this:
Act like a professional, be prepared like a professional, and get treated like a professional. Less hassle and you get to ride in cool places.
If you act like they have to let you take it. Insert millennial attitude here. Then the more hassle and you get to walk in cool places.