Lithium-ion Battery 2000mAh 5c 18650 li-ion cell, High-quality, durable, and long-lasting lithium-ion battery with a capacity of 2000mAh 18650 battery cell with a rated voltage of 3.7V and a capacity of 5C. This is a must have for any device that needs to run on rechargeable batteries. This battery is ideal for use in photography equipment, flashes, electronic cigarettes, and other electronic devices which need powerful batteries to operate.