The 18650 battery is a type of lithium-ion rechargeable battery with a standard size of 18mm by 65mm. It is commonly used in many electronic devices such as laptops, flashlights, and electric vehicles. The 18650 battery has a high energy density and can store a large amount of energy in a relatively small size, making it a popular choice for portable devices. It is also known for its long cycle life, which means it can be charged and discharged many times before it needs to be replaced. However, it is important to note that the 18650 battery should be used with caution and handled properly to avoid safety risks such as explosion and fire.

The 18650 battery is a cylindrical lithium-ion battery with a diameter of 18mm and a length of 65mm. It was first introduced by Sony in 1991 and has since become one of the most widely used rechargeable batteries in many electronic devices, including laptops, power tools, and electric vehicles. Compared to other types of batteries, the 18650 battery has a higher energy density, longer cycle life, and better performance in cold temperatures. It is also known for its ability to deliver high discharge currents, making it a popular choice for applications that require high power output. However, it is important to handle the 18650 battery properly and avoid overcharging or overheating, as these can cause safety risks.