18650 lithium 3.7 battery

　　Advantages of 18650 lithium battery and polymer lithium battery

　　The shape of the polymer battery is light, and it is the most beautiful in the world of lithium batteries. The appearance can be customized at will, and the battery can be thinner, just like that. Therefore, the mobile charger with polymer batteries can also be designed in terms of appearance. More sensitively, many smart wearable devices now basically use polymer lithium batteries as batteries, which can make their products more fashionable and casual in appearance.

　　1. Advantages of 18650 lithium battery and polymer lithium battery

　　1. The 18650 lithium battery is cylindrical with transparent liquid inside. This is because of the battery design and materials. 18650 supports high current, so almost all notebooks and electric cars basically use 18650 battery design. Only for very notebooks, due to resource saving, polymer lithium batteries can be directly used without 18650 batteries, especially for tablets; for digital cameras, because the charging of flashlight batteries requires a high voltage and a large amount of current for a moment , so only 18650 rechargeable batteries are used, and the volume is slightly smaller;

　　2. The advantage of polymer lithium battery is that it is small in size and large in volume. The disadvantage is that its service life is shorter than that of 18650. This is because of the use of different designs and materials. Some of them are transparent liquid inside, and some are Dry or fibrous, the high current charge and discharge performance is not as good as that of 18650 cylindrical rechargeable batteries, so it requires large space and small volume power consumption equipment, generally using polymer lithium batteries, the most common performance is Mobile phones, tablets, etc.

　　Second, the service life of lithium batteries is only two or three years.

　　Generally, lithium batteries can be charged and discharged 300-500 times. Partial charging and discharging of lithium batteries is more effective than full charging and discharging, and frequent full charging and discharging should be avoided as much as possible. When the rechargeable battery enters the production line, the clock starts to work. Regardless of whether you use it or not, the service life of lithium batteries is only two or three years.

　　"Lithium battery" is a rechargeable battery with lithium metal material or lithium aluminum alloy as the negative electrode, which uses a non-hydrolyzed reaction solution. Lithium metal batteries were first proposed and researched in 1912. In the 1970s, lithium batteries were clearly proposed and scientific research began. Due to the strong chemical properties of lithium metal, it has high environmental requirements in processing, storage and application. Therefore, lithium batteries have not been used for a long time. With the development of technology, lithium batteries have become popular.