1、 What is the cycle life of 18650 lithium batteries?

18650 lithium battery is currently the most common type of lithium-ion battery on the market, and its name represents the size of the battery: 18 represents a diameter of 18 millimeters, and 65 represents a length of 65 millimeters. Cycle life refers to the percentage of the initial capacity that a battery can maintain after completing several charge and discharge cycles.

2、 What is the typical cycle life of 18650 lithium batteries?

Generally speaking, the cycle life of 18650 lithium batteries is between 300 and 500 cycles. This means that under normal use, each 18650 lithium battery can complete 300 to 500 charge and discharge cycles, and its capacity will gradually decrease to about 80% of the initial capacity.

3、 Factors affecting the cycle life of 18650 lithium batteries

Charging and discharging speed: Rapid charging and discharging can lead to intensified chemical reactions inside the battery, accelerating capacity degradation. Therefore, controlling the charging and discharging speed appropriately can extend the cycle life.

Depth of charge and discharge: Deep charge and discharge can accelerate the decay of battery capacity, so try to avoid completely emptying or filling the battery during use.

Temperature: High temperatures can accelerate the capacity degradation of batteries, so try to avoid overheating during use and storage.

Charging frequency and charging method: Exceeding the battery's specified charging frequency and using improper charging methods can shorten the cycle life.

4、 How to extend the cycle life of 18650 lithium batteries?

To extend the cycle life of 18650 lithium batteries, we can take the following measures:

Control the charging and discharging speed: Try to avoid fast charging and discharging and choose an appropriate charging and discharging speed.

Avoid deep charging and discharging: Try to avoid completely emptying or charging the battery, and keep the charging and discharging between 20% and 80%.

Temperature control: Avoid overheating the battery and try to use and store it in an environment between 20 ℃ and 25 ℃.

Reasonable charging frequency and charging method: Follow the battery usage instructions, do not exceed the specified charging frequency, and choose an appropriate charging method.

5、 Summary

In summary, the cycle life of 18650 lithium batteries is generally between 300 and 500 cycles. However, by controlling the charging and discharging speed, avoiding deep charging and discharging, controlling temperature, and using charging frequency and charging method reasonably, we can extend the cycle life of the battery and improve its service life. Therefore, when using 18650 lithium batteries, we should pay attention to the above factors, use and maintain the battery reasonably, in order to improve its cycle life.

Shenzhen Topband Battery Co., Ltd.，established in 2006, is a wholly-owned subsidiary of Shenzhen Topband Co., Ltd. (002139.SZ). We focus on lithium iron phosphate batteries,with independent research and development in cells and BMS. With the ability to integrate the entire industry chain, we are committed to providing customers with one-stop lithium battery solutions and services. Our quality products are widely used in energy storage and light power.