What are the size parameters of 18650 lithium batteries?

What are the size parameters of 18650 lithium batteries?

18650 lithium battery is a common specification of lithium-ion batteries, named after the external dimensions of the battery - diameter 18 millimeters, height 65 millimeters. This standardized lithium battery specification first appeared in the 1990s and quickly became the mainstream power battery for portable electronic devices such as laptops and power tools due to its excellent performance and relatively low cost. With the rise of emerging fields such as electric vehicles and energy storage, the application of 18650 batteries has also continued to expand, and it has now become a representative product in the lithium battery industry.

Dimensions of 18650 lithium battery
The external dimensions of 18650 batteries mainly include two parameters: diameter and height. Among them, the diameter is 18 millimeters and the height is 65 millimeters, hence the name "18650". This external dimension is more compact compared to other common lithium battery specifications such as 14500, 26650, etc., which is beneficial for the design and integration of battery packs. At the same time, 18650 batteries also have high energy density, which can provide long-lasting endurance for electronic devices.

Capacity and Performance of 18650 Battery
In addition to standardized external dimensions, 18650 batteries also have their own characteristics in terms of capacity and performance. At present, the nominal capacity of 18650 batteries on the market is usually between 2000-3500mAh, and some high-performance batteries can even reach over 4000mAh. At the same time, 18650 batteries also have advantages such as high power output capability, good low-temperature performance, and long service life. These characteristics make it widely used in fields such as electric bicycles, power tools, and mobile power sources.

The safety of 18650 batteries
As a type of lithium-ion battery, 18650 batteries also need to be given extra attention in terms of safety. Improper use or thermal runaway during charging can pose safety hazards such as battery explosion or fire. Therefore, manufacturers usually integrate various protection circuits inside the battery, such as overcharge, overdischarge, overcurrent and other protection functions, to ensure the safety of the battery under normal use conditions. At the same time, users also need to comply with relevant safety operation regulations when using 18650 batteries.

Application Fields of 18650 Battery
With its excellent performance and safety, 18650 batteries are widely used in portable electronic devices, electric bicycles, power tools, electric vehicles, and energy storage systems. In the design of battery packs, 18650 batteries are highly favored due to their standardized external dimensions and reliable performance advantages. In the future, with the continuous advancement of new energy technology, the application scope of 18650 batteries is expected to further expand, making greater contributions to the sustainable development of human society.

18650 lithium batteries have an irreplaceable position in modern electronic devices due to their standardized size and performance advantages. Whether in the fields of consumer electronics, power tools, or electric vehicles, 18650 batteries have demonstrated excellent adaptability and superior performance. When selecting and using 18650 batteries, key parameters such as size, voltage, and capacity should be considered to ensure that they meet specific application requirements.

What are the size parameters of 18650 lithium batteries? The size parameters of 18650 lithium batteries are a diameter of 18mm and a height of 65mm. 18650 lithium battery is a standardized cylindrical lithium-ion battery, named after its size specifications - a diameter of 18 millimeters (18mm) and a length of 65 millimeters (65mm), with the final "0" indicating that it is a cylindrical shaped battery. This type of battery was first commercialized by Sony Corporation in the early 1990s and became a standard model in the industry. Due to its high energy density, rechargeable nature, and diverse chemical systems, 18650 batteries are widely used in various electronic products and devices.