Analysis of the lifespan and influencing factors of 18650 lithium batteries.
The cycle life of 3.7V 18650 can reach 500~1000 times, and the cycle life of 3.2V 18650 can reach over 2000 times.
18650 is the pioneer of lithium-ion batteries and a standard lithium-ion battery model introduced to save costs. Among them, 18 represents a diameter of 18mm, 65 represents a length of 65mm, and 0 represents a cylindrical battery.
The common
18650 batteries are divided into lithium-ion batteries and lithium iron phosphate batteries. The nominal voltage of lithium-ion batteries is 3.7V, with a charging cut-off voltage of 4.2V. The nominal voltage of lithium iron phosphate batteries is 3.2V, with a charging cut-off voltage of 3.6V. The capacity is generally 1200mAh-3350mAh, with commonly used capacities ranging from 2200mAh to 2600mAh.
Lithium ion batteries are widely used due to their light weight, large capacity, and no memory effect. Many digital devices use lithium-ion batteries as a power source, despite their relatively high price. The energy density of lithium-ion batteries is very high, with a capacity 1.5 to 2 times that of nickel hydrogen batteries of the same weight, and their self discharge rate is very low.
18650 has excellent stability performance in work and is widely used in various electronic fields: commonly used in high-end high-power 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.
