Amazon.com: 7.2V 2400mAh Rechargeable Ni-MH Battery AA Battery Pack with Standard Tamiya Connector for RC Car RC Truck Household Appliances 2 Pack with USB Charger : Toys & Games
Nikko 4.8v 600mAh battery pack and charger
NIKKO 7.2V 1600MAH mega power pack and charger (1310) in category Gadgets - Hobbies/RC Models at Easy Technology.
Li-ion 7.2v 2250mah Battery For Nikko Remote Control F1 Ferrari Car 14500c2s3ph - Rechargeable Batteries - AliExpress