Can I take E-Toll Transponder on a Plane?

Question

I'm flying down to Sydney to buy a car and am wondering can I take a E-toll transponder on a plane to make my trip back abit easier.

Thanks

Answer 1

Make sure you turn it off or take the batteries out before taking it on a plane.  Then there should be no problem.

Answer 2

Pull that battery and pack it in the foil liner that should have accompanied the unit.

Answer 3

go ahead

just put it on the conveyor belt at security and all's fine