Lithium-ion batteries have the advantages of light weight, large capacity, and no memory effect, so they have been widely used. Many digital devices use lithium-ion batteries as power sources, although their prices are relatively expensive. Lithium-ion battery has a high energy density, its capacity is 1.5 to 2 times that of a nickel-hydrogen battery of the same weight, and it has a very low self-discharge rate. In addition, lithium-ion batteries don't have "memory effect" and contain toxic substances, which are important reasons for their wide application.
Advantages
1、Large capacity: The capacity of 18650 lithium battery is generally between 1200mah~3600mah, while the general battery capacity is only about 800mah. If combined into a 18650 lithium battery pack, the 18650 lithium battery pack can easily exceed 5000mah.
2、Long working life: The 18650 lithium battery has a long service life, and the cycle life can reach 1000 times in normal use, which is more than twice that of ordinary batteries.
3、High safety performance:In order to prevent the battery from short-circuiting, the positive and negative electrodes of the 18650 lithium battery are separated. Therefore, the short-circuit phenomenon may have been reduced to the extreme. A protection board can be installed to avoid overcharge and overdischarge of the battery, which can also extend the service life of the battery.
4、No memory effect: No need to empty the remaining battery before charging, easy to use.
5、Can be combined in series or parallel to form a 18650 lithium battery pack
6、Wide range of use: laptops, instruments, audio equipment, model airplanes, toys, electric bicycle and other electronic equipment.
Disadvantages
1、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. Of course this disadvantage can also be said to be an advantage. This is compared with other lithium batteries such as polymer lithium batteries. This is a disadvantage in terms of customizable and transformable size.
2、The production conditions of 18650 lithium batteries are demanding, which undoubtedly increases production costs.
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