Amazon.com: Rechargeable Lithium Ion Battery Pack - VIDAR 7.4V 6600mAh High Capacity Li-ion Battery Pack with JST PH2.54/2P Plug-in(Customizable) for Electronics,Toys,Lighting,Equipment : Health & Household
3.7V 6600mAh 18650 Lithium Ion Battery Pack (1S3P of FLC-18650-2200) - China Battery Pack, Li-Ion Cell | Made-in-China.com