Battery Lithium battery ICR 18650 2600mah with protection circuit ...
18650 Cylinder Rechargeable Samsung Panasonic LG 2600mAh 3000mAh 3400mAh 3500mAh 3.7 V Lithium-ion 18650 Li-io
Amazon.com: VIDAR Rechargeable Lithium Ion Battery Pack 7.4V 2600mAh High Capacity Li-ion Battery Pack with JST PH2.54/2P Plug-in(Customizable) for Electronics,Toys,Lighting,Equipment : Health & Household