Amazon.com: Blomiky 7.4V 600mAh Li-ion Rechargeable Battery Compatible with Some Gel Water Ball Blaster and WPL C24 D12 RC Truck / D12 Battery 2 : Toys & Games
Li-Po Battery Pack 7,4V 800mAh
7.4v 800mAh 18350 Li-ion Battery for H100 H102 H106 7.4v Battery for JJRC S1 S2 S3 S4 S5 High Speed RC boat - AliExpress