Spektrum 2S Smart LiPo Hard Case Battery Pack w/IC3 Connector (7.4V/5000mAh) (SPMX50002S30H3)
Amazon.com: Tenergy Battery Packs and Charger Combo, 7.2V 3000mAh NiMH Battery Packs with Standard Tamiya Connector and Fast Charger for Hobby Battery for RC Car, RC Truck, RC Tank, RC Boat :
HQRP Compact Battery Pack NI-MH 9.6V 1200mAh Rechargeable with Standard Tamiya Connector for RC Car Boats Robots Hobby - Walmart.com