HobbyStar 5200mAh 7.4V 2S 100C Hardcase LiPo Battery Low IR
Amazon.com: Rechargeable Lithium Ion Battery Pack - VIDAR 7.4V 5200mAh High Capacity Li-ion Battery Pack with JST PH2.54/2P Plug-in(Customizable) for Electronics,Toys,Lighting,Equipment : Health & Household