The specifications and dimensions of
cylindrical lithium-ion batteries are usually represented by five digits. Starting 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 represents a circle. There are many models of cylindrical lithium-ion batteries, including 10400, 14500, 16340, 18650, 21700, 26650, 32650, etc.
① 10440 battery
The 10440 battery is a type of lithium battery with a diameter of 10mm and a height of 44mm. It is the same size as the commonly referred to as the "No. 7 battery", and its capacity is generally very small, only a few hundred mAh. It is mainly used in mini electronic products. For example, flashlights, mini speakers, amplifiers, etc.
② 14500 battery
14500 battery is a type of lithium battery with a diameter of 14mm and a height of 50mm. This type of battery is generally 3.7V or 3.2V, with a relatively small nominal capacity, slightly larger than 10440 battery, usually 1600mAh. It has excellent discharge performance and is mainly used in consumer electronics, such as wireless audio, electric toys, digital cameras, etc.
③ 16340 battery
16340 battery is a type of lithium battery with a diameter of 16mm and a height of 34mm. Due to its shorter height and relatively small capacity, it is often used in high light flashlights, LED flashlights, headlights, laser lights, lighting fixtures, and other applications.
④ 18650 battery
18650 battery is a type 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 reaching 170 watt hours/kg. Therefore, this type of battery is a cost-effective battery. We often see this type of battery because it is a mature lithium battery with good system quality stability in all aspects. It is widely used in situations with a battery capacity of about 10 kilowatt hours, such as in small appliances such as mobile phones and laptops.
⑤ 21700 batteries
21700 battery is a type of lithium battery with a diameter of 21mm and a height of 70mm. Due to its increased volume, space utilization efficiency increases, and the energy density of battery cells and systems can be improved. Its volumetric energy density is much higher than that of 18650 battery, and it is widely used in digital, electric vehicles, balance cars, solar powered lithium battery street lights, LED lights, electric tools, etc.
⑥ 26650 battery
26650 battery is a type of lithium battery with a diameter of 26mm and a height of 65mm, with a nominal voltage of 3.2V and a nominal capacity of 3200mAh. This type of battery has excellent capacity and high consistency, and has gradually become a trend to replace 18650 batteries. Many products in the field of power batteries will also gradually favor it.
⑦ 32650 battery
32650 battery is a type of
lithium battery with a diameter of 32mm and a height of 65mm. This type of battery has strong continuous discharge capacity, making it suitable for electric toys, backup power sources, UPS batteries, wind power generation systems, and wind solar complementary power generation systems.
Guangzhou Battsys Co., Ltd (NEEQ:837375), was founded in 2006, which is a join-stock high-tech enterprise engaging in ODM and OEM , specially for customized and diverse research&production of lithium-ion battery，BATTSYS annual production capacity is tens of millions battery cells. The products are exported to dozens of countries & regions such as Europe, America & Asia etc.
