Analysis of the differences and advantages and disadvantages of 18650 lithium batteries and polymer lithium batteries

18650 battery life theory is 1000 cycles of charging. Because of the large capacity of unit density, most of them are used in notebook computer batteries. In addition, because of the stable performance of the 18650 at work, it is widely used in various electronic fields: often used in high-end glare flashlights and portable Power supply, wireless data transmitter, etc. Polymer batteries are mainly used in mobile phones and mobile DVDs. 2. Different electrolyte materials: liquid lithium batteries use liquid electrolytes, while polymer lithium batteries use solid polymer electrolytes instead. Advantages and disadvantages: 1. Advantages of polymer lithium battery: The working voltage of single battery is as high as 3.6v~3.8v, which is much higher than the 1.2V voltage of nickel-hydrogen and nickel-cadmium batteries. The capacity density is large, and its capacity density is 1.5 to 2.5 times or higher than that of nickel-hydrogen batteries or nickel-cadmium batteries. The self-discharge is small, and its capacity loss is small after being left for a long time. There is no memory effect, no need to empty the remaining power before charging, easy to use. Disadvantages: high battery cost, difficult to purify the electrolyte system. To protect the circuit control, overcharging or overdischarging will destroy the reversibility of the chemical substances inside the battery, which will seriously affect the battery life. 2. Advantages of 18650 lithium battery: The capacity is generally between 1200mah~3600mah, and the general battery capacity is only about 800mah. If combined into an 18650 lithium battery pack, the 18650 lithium battery pack can easily break through 5000mah. Disadvantages: The biggest disadvantage of the 18650 lithium battery is that its size has been fixed, and it is not well positioned when it is installed in some notebooks or some products. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete.