Lithium 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. Lithium 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 gives longer runtimes and will work in all Night Eyes lights. 

Capacity: 3400mAh with PCB
Voltage: 3.7V / Dimension: 18650 size 6.5cm x 1.8cm
Type: Rechargeable 18650 Flat Top