Amazon.com: Venom Drive Series 20C 2S 5000mAh 7.4V Hard Case LiPo Battery - Includes 12 AWG Soft Silicone Wire Connector, Universal Plug & Adapter System Compatible with Deans, Traxxas, and EC3 Plug
2x Yowoo 100C 3S 5000mAh XT90 11.1V Graphene Lipo Battery for RC Helicopter Car | eBay