1-10pcs 7.4v Lipo Battery For Remote Control Toy Car Robot Spare Parts 7.2v 8.4v Batteries Oda Palace Joint 5200mah 15*50*83mm - Battery Packs - AliExpress
Lectron Pro NiMH 8.4V (7-cell) 5000mAh Flat Pack with XT60 Connector / * Iron City RC Hobbies
Amazon.com: Venom Power - Drive Series 8.4V 5000mAh 7-Cell NiMH Battery Flat - Universal 2.0 Plug/Adapter System Compatible, for Most 1/10 Brushed Radio Control Boats, 2WD and 4WD Cars, Trucks & Buggies :