Li-Ion batteries are one of the most common rechargeable batteries in portable electronics. They are known for having one of the best energy densities, no memory effect, and a slow loss of charge when not in use. Li-Ion batteries are also environmentally safe because there is no free lithium metal. Our batteries are the highest quality batteries you can purchase. This 18650 Li-Ion battery will work in all Night Eyes lights. 

Capacity: 2600mAh with PCB
Voltage: 3.7V / Dimension: 18650 size 6.5cm x 1.8cm
Type: Rechargeable 18650 Flat Top