Nikko 9.6v battery pack and charger substitution set.
Nikko 9.6v Slide Slot in Battery - Etsy
Amazon.com: BAOBIAN 9.6V 1500mAh NiMH High Capacity Rechargeable RC Battery with Standard Tamiya Connector for RC Car Boats Robots and OTC Genisys 239180 & EVO Scan Scanner(2 Pack) : Toys & Games
Nikko Li-FePO4 9.6V Mega Pack | bol.com
Amazon.com: 9.6V 600mAh NI-CD Battery AA Battery Pack for RC Toy RC Truck Household Electric Appliances Lighting Equipment with Charging USB Cable : Toys & Games