United States Department of Transport prohibits the transport of lithium-ion batteries as cargo on passenger aircraft - Newsshooter
Amazon.com: Tenergy NiMH Receiver RX Battery with Hitec Connectors 6V 2000mAh High Capacity Rechargeable Battery Pack for RC Airplanes/RC Aircrafts and More : Toys & Games
7.2v 3600mah Nimh Battery With Standard Tamiya Connector For Rc Car, Rc Truck, Rc Tank, Rc Boat, Rc Buggy, Rc Airplane - Rechargeable Batteries - AliExpress