The theoretical lifespan of 18650 batteries is 1000 cycles of charging. Due to the large capacity per unit density, most of it is used for laptop batteries, except for

　　In addition, due to its excellent stability performance in work, the 18650 is widely used in various electronic fields: commonly used in high-end strong light flashlights, portable power supplies, wireless data transmitters, electric warm clothing, shoes, portable instruments and meters, portable lighting equipment, portable printers, industrial instruments, medical instruments, etc.

　　difference

　　18650 means a diameter of 18 millimeters and a length of 65 millimeters. The model of battery number 5 is 14500, with a diameter of 14 millimeters and a length of 50 millimeters. Generally, 18650 batteries are used more in industry and less in civilian use. The common ones are also used more in laptop batteries and high-end flashlights.

　　18650 is only the size and model of the battery, which can be divided into lithium-ion 18650, lithium iron phosphate 18650, nickel hydrogen 18650 (rare), and common 18650 is lithium-ion.

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