18650 rechargeable lithium-ion batteries for sale two-pack of High-quality and high-capacity 18650 rechargeable battery 2200mah 3.7v for flashlights, headlamps, and other devices. The protected-cell lithium-ion 18650 rechargeable battery 2200mah 3.7v fit in any standard 18650 battery charger. This two pack 18650 battery measures 18 mm by 65 mm and is rated at 3.7 volts 2200 mah. Note that this is a two-pack color, or brand may vary with availability, but High-quality quality will remain the same or better.