Amazon.com: 4.8V 2400mAh AA Battery Pack Ni-MH Rechargeable Battery with SM-2P Plug for HY800 F1 F3 RC Boat RC Bus RC School Bus 2 Pack with USB Charging Cable : Toys &
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4.8V 700mAh NiCd Nikko Style Hobby battery pack
Amazon.com: OooSure 1400mAh 4.8V 5557 Connecter Rechargeable NiCD Battery AA X 4/5559 Plug for RC Toy Household Electric Appliances Lighting Equipment with Charging USB Cable : Toys & Games