18650 is the originator of lithium-ion batteries-a standard lithium-ion battery model set by SONY in Japan in order to save costs. 18 represents a diameter of 18mm, 65 represents a length of 65mm, and 0 represents a cylindrical battery.
18650 lithium battery life theory is 1000 cycles of charging. Because of the large capacity of unit density, most of them are used in notebook computer batteries. In addition, because 18650 lithium has a very good stable performance in work, it is widely used in various electronic fields; often used in high-end glare flashlights, Portable power supply, wireless data transmitter, electric heating warm clothes, shoes, portable instruments and meters, portable lighting equipment, portable printers, industrial instruments, medical instruments, etc.