Hoverboards, Segways, self-balancing boards, unicycles, electric scooters etc

Generally forbidden. Check with your airline. These devices often contain batteries that exceed the provision for carriage in passenger’s luggage (160 Watt Hours). Devices with batteries of 101-160 Wh may only be carried with the approval of the airline; however, due to the limited product specifications, unverifiable quality control around the manufacture, and difficulty in establishing compliance with Australian consumer product safety standards, most airlines will not allow these devices.