With the development of lithium-ion battery technology, there are more and more types of cylindrical lithium-ion batteries, which are divided into three material systems: lithium cobalt oxide, lithium manganese oxide, and ternary materials. Each type of battery has its own advantages. Let's take a look at the types and specifications of cylindrical lithium-ion batteries together.
Cylindrical lithium-ion cells are usually represented by five digits. The first two digits refer to the battery diameter, the third and fourth digits refer to the battery height, and the fifth digit represents the shape. Cylindrical lithium-ion batteries have many models, including ER17505, 10400, 14500, 16340, 18650, 21700, 26650, and 32650.
1. 10440 Cylindrical Lithium-Ion Battery
The 10440 battery is a lithium-ion battery with a diameter of 10mm and a height of 44mm, which is the same size as the commonly known size of a No.7 battery. Different from pouch style battery, this type of battery has a small capacity, usually only a few hundred mAh, and is important in mini electronic products.
2. 14500 Cylindrical Lithium-Ion Battery
The 14500 battery is a lithium-ion battery with a diameter of 14mm and a height of 50mm, which is the same size as a No.5 battery. This type of battery is generally 3.7V or 3.2V and has a small nominal capacity of about 1600mAh. It has superior discharge performance and is mainly used in consumer electronics.
3. 16340 Cylindrical Lithium-Ion Battery
The 16340 battery is a lithium-ion battery with a diameter of 16mm and a height of 34mm. Due to its shorter height and moderate capacity, it is often used in high-power flashlights, LED flashlights, headlights, laser lights, lighting fixtures, and so on.
4. 18650 Cylindrical Lithium-Ion Battery
The 18650 battery is a lithium-ion battery with a diameter of 18mm and a height of 65mm. Its biggest feature is its very high energy density, which is almost 170 watt-hours per kilogram. Therefore, this battery is cost-effective, and it is widely used in various applications with a capacity of about 10 kWh.
5. 21700 Cylindrical Lithium-Ion Battery
The 21700 battery is a lithium-ion battery with a diameter of 21mm and a height of 70mm. As a result of its increased volume and improved space utilization, the energy density of the cell and system can be increased. Its volume energy density is much higher than that of the 18650 battery, and it is widely used in digital devices, electric vehicles, balance cars, solar lithium-ion battery street lights, LED lights, electric tools, etc.
6. 26650 Cylindrical Lithium-Ion Battery
The 26650 battery is a lithium-ion battery with a diameter of 26mm and a height of 65mm. The nominal voltage is 3.2V and the nominal capacity is 3200mAh. This type of battery has excellent capacity and high consistency, and is gradually becoming the trend to replace the 18650 battery. Many products in the field of power lithium-ion batteries are also increasingly favoring this battery.