Introduction of common cylindrical lithium battery models

Cylindrical Li-ion cells are usually indicated by five digits, counting from the left, the first and second digits refer to the cell diameter, the third and fourth digits refer to the cell height, and the fifth digit indicates the round shape. There are many models of cylindrical lithium batteries, the more common are 10400, 14500, 16340, 18650, 21700, 26650, 32650, etc.

1、10440 battery

10440 battery is a diameter of 10mm, height of 44mm lithium battery, and we are often called “No. 7 battery” size, this battery capacity is generally very small, only a few hundred mAh, mainly used in mini-electronic products. For example, flashlights, mini stereos, amplifiers, etc.

2、14500 battery

14500 battery is a 14mm diameter, 50mm height of lithium batteries, this battery is generally 3.7V or 3.2V, the nominal capacity is relatively small, a little larger than the 10440 battery, generally 1600mAh, discharge performance is superior, the application areas are mainly consumer electronics, such as wireless audio, electric toys, digital cameras, etc.

3、16340 battery

16340 battery is a kind of lithium battery with a diameter of 16mm and a height of 34mm. This kind of battery is often found in strong flashlights, LED flashlights, headlamps, laser lights, lighting fixtures, etc. because the height of the ruler is a little shorter and the capacity is not very small.

4、18650 battery

18650 battery is a diameter of 18mm, height of 65mm lithium battery, its biggest feature is to have a very high energy density, almost 170 watt hours / kg, so this battery is a better cost performance of the battery, we usually see most of this battery, because it is more mature lithium battery, all aspects of the system quality stability is better, widely used in 10 kWh About the battery capacity occasions, such as in, in cell phones, laptops and other small appliances.

5、21700 battery

21700 battery is a diameter of 21mm, height of 70mm lithium battery, because of its increased volume, space utilization becomes larger, the cell monomer and system energy density can be improved, its volume energy density is much higher than 18650 type batteries, widely used in digital, electric vehicles, balance car, solar energy lithium battery street lights, LED lights, power tools, etc..

6、26650 battery

26650 battery is a 26mm diameter, 65mm height lithium battery, nominal voltage 3.2V, nominal capacity 3200mAh, this battery with excellent capacity and high consistency and other characteristics, has gradually become a trend to replace the 18650 battery, many products in the power battery will also gradually favor this.

7、32650 battery

32650 battery is a 32mm diameter, 65mm height lithium battery, this battery has a strong capacity for continuous discharge, so it is more suitable for electric toys, backup power, ups battery, wind power generation system, wind and wind complementary power generation system.