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Introduction of common cylindrical lithium-ion battery models

Cylindrical lithium-ion batteries are usually represented by five digits. Counting from the left, the first and second digits are the diameter of the battery, the third and fourth digits are the height of the battery, and the fifth digit represents the cylindrical shape. There are many types of cylindrical lithium batteries, the more common ones are 10400, 14500, 16340, 18650, 21700, 26650, 32650 and so on.

cylindrical lithium ion batteries

1. 10440 battery

The 10440 battery is a lithium battery with a diameter of 10mm and a height of 44mm. The battery capacity is generally small, only a few hundred milliamperes, and is mainly used for mini electronic products. For example, flashlights, mini speakers, speakers, etc.

2.14500 battery

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

3.16340 battery

The 16340 battery is a lithium battery with a diameter of 16mm and a height of 34mm. This kind of battery is small in height and capacity, so it often appears in strong light flashlights, LED flashlights, headlights, laser lights, lighting fixtures, etc.

4. 18650 battery

The 18650 battery is a lithium battery with a diameter of 18mm and a height of 65mm. Its biggest feature is its very high energy density, almost reaching 170 Wh/kg. Therefore, this battery is a relatively cost-effective battery. Most of the batteries we usually see are this kind of batteries, because they are relatively mature lithium batteries and have good system quality stability in all aspects. They are widely used in products with a battery capacity of approximately 10 kWh, such as small home appliances such as mobile phones and laptop computers.

5. 21700 battery

The 21700 battery is a lithium battery with a diameter of 21mm and a height of 70mm. Due to the improvement of its volume and space utilization, it can increase the energy density of batteries and systems. Its volume energy density is much higher than that of 18650 batteries. It is widely used in digital, electric vehicles, balance vehicles, solar lithium battery street lights, LED lights , Power tools, etc.

6, 26650 battery

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

7, 32650 battery

The 32650 battery is a lithium battery with a diameter of 32mm and a height of 65mm. This battery has a strong continuous discharge capacity, so it is more suitable for electric toys, backup power supplies, UPS batteries, wind power generation systems, wind energy and solar hybrid power generation systems.

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