The size of the 18650 battery is 18 millimeters (18mm) in diameter and 65 millimeters (65mm) in length. The design of this type of battery is beneficial for automated production and arrangement and installation in various devices. The size specifications of 18650 batteries are named after their physical parameters – diameter and length, where “18” represents diameter, “65” represents length, and “0” represents cylindrical shape.
The specific size parameters of the 18650 battery are a diameter of 18.0 ± 0.2mm and a height of 65.0 ± 0.5mm. The weight of this battery is about 45 grams. In practical applications, 18650 batteries are commonly used in devices such as laptops, electric vehicles, and high-intensity flashlights, and are widely used in daily life due to their high energy density and long cycle life.
English 
French