What is 18650 battery cell and the advantages and disadvantages of 18650 battery cell.

What is an 18650 battery cell
The 18650 lithium battery is a common type of lithium battery in electronic equipment and instruments, and is also one of the main types of battery cells in mobile power sources at present. It is generally cylindrical, with a diameter of 18 millimeters and a height of 65.0 millimeters. Therefore, it is commonly referred to as the 18650 battery cell in the battery industry.

Advantages of 18650 battery cells

1. Widely used: mobile power supplies, laptops, wireless walkie talkies, portable DVDs, instruments and meters, professional audio equipment, aircraft models, electric toys, surveillance cameras, digital cameras and other electronic product equipment are all used.
2. Flexible and flexible combination: Parallel or series connection, different numbers of 18650 battery cells can be easily made into a variety of battery packs through conventional combination methods, fully meeting different needs.
3. Low internal resistance: The internal resistance of 18650 battery cells is generally within 35m Ω, greatly reducing the battery's self consumption and increasing its service life.
4. No memory: The 18650 battery cell is specifically designed for lithium-ion batteries and will not have memory.
5. High voltage: The voltage of 8650 lithium 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.
7. Long service life: The charging and discharging cycle frequency is greater than 500 times. The storage capacity is generally 1200mAh to 3000mAh, and the common storage capacity is 2200mAh to 2600mAh.

8. Cheap price: For polymer cells, the price of 18650 cells is relatively lower.

Disadvantages of 18650 battery cells
1. Decay: The storage capacity of all lithium-ion batteries will gradually decline, depending on the frequency of use and operating temperature.
2. Difficulty in recycling: There is basically no recycling available.
3. Inability to Overcharge and Overdischarge: During overcharging, the excessively embedded lithium ions will permanently remain fixed in the crystal structure and cannot be released again, which can cause a short battery life. During over discharge, excessive lithium ions are removed from the electrode, which can cause the crystal structure to collapse and shorten its lifespan.

4. Not flexible and adaptable: Due to the fixed basic shape and size, it is difficult to be as flexible and adaptable as polymer cells. Of course, this is also an advantage, as fixed specifications mean replaceable.

Guangzhou Battsys Co., Ltd (NEEQ:837375), was founded in 2006, which is a join-stock high-tech enterprise engaging in ODM and OEM , specially for customized and diverse research&production of lithium-ion battery，BATTSYS annual production capacity is tens of millions battery cells. The products are exported to dozens of countries & regions such as Europe, America & Asia etc.