What is the service life of 18650 power lithium batteries?

The current 3.7V 18650 lithium-ion battery generally has a cycle life of about 500-1000 times, while the 3.2V 18650 has a cycle life of over 2000 times. Of course, the prerequisite is that qualified batteries produced by legitimate manufacturers are qualified. If they are defective or counterfeit batteries, their lifespan will be very short. The lifespan of 18650 lithium-ion batteries is only two to three years.

Lithium ion batteries can generally be charged and discharged 300-500 times. It is best to perform partial discharge on lithium-ion batteries instead of complete discharge, and to prevent frequent complete discharge as much as possible. Once the battery is taken off the production line, the clock starts to move. Regardless of whether you use it or not, the lifespan of lithium-ion batteries is only two to three years.

The lifespan of a 18650 lithium battery is generally 300-500 charging cycles. Assuming that the amount of electricity supplied by a complete discharge is Q, without considering the decrease in electricity after each charging cycle, a lithium battery can supply or supplement a total of 300Q-500Q of electricity during its lifespan. From this, we can understand that if you charge with 1/2 each time, you can charge 600-1000 times; If 1/3 is used each time to charge, it can be charged 900-1500 times. Similarly, if charged randomly, the number of times is uncertain.

A common saying that people often hear is that the lifespan of lithium-ion batteries is 500 cycles. In the principle of lithium-ion batteries, cycle life refers to a complete charge and discharge cycle. The testing method in the industry is: discharge depth× Charging frequency=cycle life, with a discharge depth of 80% in numerical terms, at least 625 charging and discharging times are required, which is 80%.

Guangzhou Battsys Co., Ltd (NEEQ:837375), was founded in 2006, which is a join-stock high-tech enterprise engaging in ODM and OEM , specially for customized and diverse research&production of lithium-ion battery，BATTSYS annual production capacity is tens of millions battery cells. The products are exported to dozens of countries & regions such as Europe, America & Asia etc.