RE: Transporting Batteries on Airline
Same here, 6x 5s in carry on luggage only. Carry them in your tranny case, tape up the balance wires and the power wires, remove tranny battery also.
I notified the airline before i travelled, they knew what i was carrying, how much etc. I spoke to their dangerous good section And had it mentioned on my E ticket
Last thing you need to do is stress them out at the airport, do your homework and you will have no problems.
Chris