How many models of cylindrical lithium batteries?

With the development of lithium battery technology, there are more and more kinds of cylindrical lithium-ion batteries, including lithium cobalt oxide, lithium manganate and ternary lithium. The batteries of these three material systems have different advantages. Let's take a look at the models and specifications of cylindrical lithium batteries.

Cylindrical lithium-ion batteries are usually represented by five digits. From the left, the first and second digits refer to the battery diameter, the third and fourth digits refer to the battery height, and the fifth digit refers to the circle. There are many types of cylindrical lithium batteries, the more common ones are 10400, 14500, 16340, 18650, 21700, 26650, 32650, etc.

1、10440 cell

10440 cell is a lithium-ion battery with diameter of 10mm and height of 44mm. It is the same size as the cell we often call AAA battery. This kind of battery has a small capacity of only a few hundred mAh, which is important for mini electronic products. For example, flashlight, mini stereo, loudspeaker, etc.

2、14540 cell

14500 cell is a kind of lithium-ion cell with diameter of 14mm and height of 50mm, which is also the specification and size of what we have always called AA battery. This kind of battery is generally 3.7V or 3.2V, and its nominal capacity is relatively small, which is a little larger than 10440 battery, which is generally 1600mAh. Its discharge performance is superior. The most important application fields are consumer electronics, such as wireless audio, electric toys, digital cameras, etc.

3、16340 cells

16340 battery is a kind of lithium-ion battery with diameter of 16mm and height of 34mm. This kind of battery is often used in strong light flashlight, LED flashlight, headlights, laser lights, lighting fixtures, etc., since its lower height and its relatively good capacity.

16340 cells 650mAh 

 4、18650 cells

18650 cell is a kind of lithium-ion battery with diameter of 18mm and height of 65mm. Its biggest feature is that it has a very high energy density, almost reaching 170 wh/ kg. Therefore, this is a cell with good cost performance. Most of the cells we usually see are 18650, because it is a relatively mature lithium-ion battery with good system quality stability in all aspects, which is widely applicable to battery capacity occasions of about 10 kwh, for example, in mobile phones, laptops and other small electrical appliances.

18650 cells 3.6V2600mAh

5、 21700 cells

21700 cell is a kind of lithium-ion battery with diameter of 21mm and height of 70mm. Because of its increased volume and space utilization, the energy density of cell monomer and system can be improved. Its volume energy density is much higher than that of 18650 battery. It is widely used in digital, electric cars, balance cars, solar energy lithium-ion battery street lights, LED lights, electric tools, etc.

6、26650 cells

26650 cell is a lithium-ion battery with diameter of 26mm and height of 65mm, with nominal voltage of 3.2V and nominal capacity of 3200mAh. This cell has excellent capacity and high consistency, and has gradually become a trend to replace 18650 batteries. In terms of power lithium battery, people gradually favor it for many products.

26650 cells 3.2V2600mAh

26650 cells 3.6V5000mAh