18650 means 18 mm in diameter and 65 mm in length. Generally, the 18650 battery is used more in industry, but few in civilian use. The common 18650 battery is also used in laptop batteries and high-end flashlights.

18650 battery life theory is 1000 cycles of charging. Because of the large capacity per unit density, most of them are used in laptop batteries. In addition, because the 18650 has a very good stability at work, the 18650 battery is widely used in various electronic fields: often used in high-end glare flashlights , Portable power supplies, wireless data transmitters, electric thermal clothing, shoes, portable instruments, portable lighting equipment, portable printers, industrial instruments, medical instruments, etc. 18650 battery is gradually introduced into civilian households, and even issued to future development and development Gas tanks, rice cookers, induction cookers, etc. are used as backup power supplies.
Of course, the performance of 18650 battery is very excellent, so as long as the capacity and voltage are suitable, 18650 battery is much better than batteries of other materials, and it is also a kind of lithium battery with higher cost performance.