The specifications and dimensions of cylindrical lithium-ion batteries are usually expressed in 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-ion batteries, including 10400, 14500, 16340, 18650, 21700, 26650, 32650, etc.

10440 Battery

The 10440 battery is a kind of lithium battery with a diameter of 10mm and a height of 44mm. It is the same size as the "No. 7 battery", which is often called. The battery capacity is generally very small, only a few hundred mAh. It is mainly used in mini electronic products. Such as flashlight, mini stereo, loudspeaker, etc.

14500 battery

14500 battery is a kind of lithium battery with a diameter of 14 mm and a height of 50 mm. It is generally 3.7V or 3.2V, with a small nominal capacity, a little larger than 10440 battery, generally 1600mAh. Its discharge performance is excellent. Its application fields are mainly consumer electronics, such as wireless audio, electric toys, digital cameras, etc.

16340 Battery

The 16340 battery is a kind of lithium battery with a diameter of 16mm and a height of 34mm. Because the ruler is a little short and the capacity is not very small, it is often used in high light flashlights, LED flashlights, headlights, laser lamps, lighting fixtures, etc.

18650 Battery

18650 battery is a kind of 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 170 watt hours/kg. Therefore, it is a battery with good cost performance ratio. Most of the batteries we usually see are of this kind, because it is a relatively mature lithium battery. The system quality stability is good in all aspects, and it is widely used in battery capacity situations of about 10 kilowatt hours, such as On mobile phones, laptops and other small appliances.

21700 Battery

The 21700 battery is a kind of 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 single cell and the system can be improved. Its volume energy density is much higher than that of the 18650 battery, and it is widely used in digital, electric vehicles, balance cars, solar energy lithium battery street lamps, LED lights, electric tools, etc.

26650 battery

26650 battery is a kind of 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 kind of battery has excellent capacity and high consistency. It has gradually become a trend to replace 18650 battery, and many products in power battery will gradually favor it.

32650 battery

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

Shenzhen Topband Battery Co., Ltd.，established in 2006, is a wholly-owned subsidiary of Shenzhen Topband Co., Ltd. (002139.SZ). We focus on lithium iron phosphate batteries,with independent research and development in cells and BMS. With the ability to integrate the entire industry chain, we are committed to providing customers with one-stop lithium battery solutions and services. Our quality products are widely used in energy storage and light power.