@undyingarchie the built-in batteries are likely larger than allowed in checked luggage, so unless they're removeable probably not.

UPDATE: looks like I'm wrong:
(from https://www.qantas.com/en-au/baggage/dangerous-goods/battery-powered-devices-and-equipment )

@undyingarchie mind you, in my experience luggage gets the shit kicked out of it and then dropped out of the hold onto the tarmac, so you'll want some pretty solid packaging for them.