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Advantages of 18650 lithium-ion batteries:

1. The capacity of a large 18650 lithium-ion battery is generally between 1200mah and 3600mah, while the general battery capacity is only about 800mah. If combined into an 18650 lithium-ion battery pack, it can easily exceed 5000mah.

2. The lifespan of 18650 lithium-ion batteries is very long, with a cycle life of over 500 times during normal use, which is more than twice that of ordinary batteries.

3. 18650 lithium-ion batteries have high safety performance, do not explode or burn; Non toxic, pollution-free, certified by RoHS trademark; All kinds of safety performance are achieved in one go, with more than 500 cycles; Good high-temperature resistance, with a discharge efficiency of 100% at 65 degrees Celsius. To prevent battery short circuits, the positive and negative poles of 18650 lithium-ion batteries are separated. So the possibility of a short circuit occurring has been reduced to the extreme. Protective plates can be installed to prevent overcharging and discharging of the battery, which can also extend its service life.

4. The voltage of 18650 lithium-ion batteries is generally 3.6V, 3.8V, and 4.2V, which is much higher than the 1.2V voltage of nickel cadmium and nickel hydrogen batteries.

5. There is no memory effect and there is no need to empty the remaining battery before charging, making it convenient to use.

6. Low internal resistance: The internal resistance of polymer cells is smaller than that of general liquid cells. The internal resistance of domestic polymer cells can even reach below 35m, greatly reducing the self consumption of batteries and extending the standby time of mobile phones, which can fully reach the level of international integration. This polymer lithium battery that supports high discharge currents is an ideal choice for remote control models, making it the most promising product to replace nickel hydrogen batteries.

7. Can be combined in series or parallel to form 18650 lithium-ion battery packs

8. Widely used in laptops, walkie talkies, portable DVDs, instruments, audio equipment, aircraft models, toys, cameras, digital cameras and other electronic devices.

Disadvantages of 18650 lithium-ion batteries:

The biggest drawback of 18650 lithium-ion batteries is that their volume is already fixed, making them difficult to locate when installed in some laptops or products. Of course, this drawback can also be considered an advantage, compared to other polymer lithium-ion batteries and other lithium-ion batteries that can be customized and can be changed in size. This is a disadvantage. And for some products with specified battery specifications, it has become an advantage.

18650 lithium-ion batteries are prone to short circuits or explosions, which is also related to polymer lithium-ion batteries. If compared to ordinary batteries, this disadvantage is not so obvious.

The production of 18650 lithium-ion batteries must have protective circuits to prevent the battery from being overcharged and causing discharge. Of course, this is necessary for lithium-ion batteries, and it is also a common disadvantage of lithium-ion batteries, because the materials used in lithium-ion batteries are mostly lithium cobalt oxide materials, and lithium-ion batteries made of cobalt oxide materials cannot discharge large currents, resulting in poor safety.

The production conditions of 18650 lithium-ion batteries require high requirements, which undoubtedly increases production costs compared to general battery production.

The theoretical lifespan of 18650 batteries is 1000 cycles of charging. Due to the large capacity per unit density, most of the 18650 is used for laptop batteries. In addition, due to its excellent stability performance in work, it is widely used in various electronic fields: commonly used in high-end strong light flashlights, portable power supplies, wireless data transmitters, electric heating and warm clothing, shoes, portable instruments and meters, portable lighting equipment, portable printers, industrial instruments, medical instruments, etc.

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