INR 18650 I stands for lithium ion, n stands for nickel and r stands for cylinder. 18650 stands for a cylindrical battery, with a diameter of 65 mm and a height of 65 mm. The nominal voltage of a single section is generally 3.6V or 3.7V V. The charging voltage is generally 4.20V (lithium cobaltate is 4.2V-4.3V). The minimum discharge termination voltage is generally 2.75V V V. Below this voltage, the battery capacity will be seriously reduced or even scrapped.
INR 18650 lithium-ion battery has the advantages of light weight, large capacity and no memory effect, so it has been widely used-many digital devices use lithium-ion batteries as power supply.
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The theory of 18650 battery life is that it can be charged 1000 times. Because of the large capacity per unit density, most of them are used for laptop batteries.
In addition, 18650 is widely used in various electronic fields because of its excellent working stability: it is commonly used in high-grade strong light flashlights, portable power supplies, wireless data transmitters, electric heating warm clothes, shoes, portable instruments, portable lighting equipment, portable printers, industrial instruments, medical instruments and so on.