Types of cylindrical lithium ion batteries
Cylindrical lithium-ion batteries are usually represented by five digits. Counting from the left, the first and second digits refer to the diameter of the battery, the third and fourth digits refer to the height of the battery, and the fifth digit denotes the circle. There are many types of cylindrical lithium batteries, the more common ones are 10400, 14500, 16340, 18650, 21700, 26650, 32650, etc.
①10440 battery
The 10440 battery is a lithium battery with a diameter of 10mm and a height of 44mm. It is the same size as what we often call the "No. 7 battery". The battery capacity is generally small, only a few hundred mAh. It is mainly used in mini electronic products. Such as flashlights, mini speakers, loudspeakers, etc.
②14500 battery
The 14500 battery is a lithium battery with a diameter of 14mm and a height of 50mm. This battery is generally 3.7V or 3.2V. The nominal capacity is relatively small, a little larger than the 10440 battery. Generally, it is 1600mAh. It has superior discharge performance and the most application field. Mainly consumer electronics, such as wireless audio, electric toys, digital cameras, etc.
③16340 battery
The 16340 battery is a lithium battery with a diameter of 16mm and a height of 34mm. Because the height of this battery is a little shorter, and the capacity is not very small, it is used in strong light flashlights, LED flashlights, headlights, laser lights, lighting fixtures, etc. Often appear.
④18650 battery
The 18650 battery is a lithium battery with a diameter of 18mm and a height of 65mm. Its biggest feature is that it has a very high energy density, almost reaching 170 watt-hours/kg. Therefore, this battery is a battery with a better cost performance. We usually Most of the batteries I saw were this kind of battery, because it is a relatively mature lithium battery, with good system quality and stability in all aspects. It is widely used in applications with a battery capacity of about 10 kWh, such as in mobile phones, laptops and other small electrical appliances. .
⑤ 21700 battery
The 21700 battery is a lithium battery with a diameter of 21mm and a height of 70mm. Because of its increased volume and space utilization, the energy density of the battery cell and the system can be improved, and its volumetric energy density is much higher than 18650 Type batteries are widely used in digital, electric vehicles, balance vehicles, solar energy 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. It has a nominal voltage of 3.2V and a nominal capacity of 3200mAh. This battery has excellent capacity and high consistency, and has gradually become a trend to replace the 18650 battery. 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, and wind and solar hybrid power generation systems.
