Uniross Rechargeable LIR18650FT 2600 Lithium Flat Top Battery The Uniross 18650 3.6/V3.7V Li-Ion Rechargeable Battery Flat Button Top is lightweight and has a very low self-discharge of less than 7% per month. Perfect for use in devices such as cameras, torches and electronic cigarettes.   Classification: Lithium-Ion Designation IEC: 18650 Nominal Typical Capacity: 2600 mAh Nominal voltage: 3.7V Average weight: 44g