26800 6800mAh 3.7v Li-ion Flat Top Battery – Aloft Hobbies
Amazon.com: Rechargeable Lithium Ion Battery Pack - VIDAR 7.4V 6800mAh High Capacity Li-ion Battery Pack with JST PH2.54/2P Plug-in(Customizable) for Electronics,Toys,Lighting,Equipment : Health & Household