Amazon.com: Venom Drive Series 20C 2S 4000mAh 7.4V LiPo Battery - Includes 12 AWG Soft Silicone Wire Connector, Patented Universal Plug/Adapter System Compatible with Deans, Traxxas, and EC3 Plug Types : Toys
Amazon.com: Zeee 6S Lipo Battery 4000mAh 22.2V 100C with EC5 Connector Soft Pack Battery for RC Airplane Helicopter RC Car Truck Tank Drone Racing Hobby(2 Pack) : Toys & Games
30C/50C, 7.4V (2S), 4000 mAh LiPo Battery (BLP-744000) – Bioenno Power