> Its format, called "18650," indicates that it is presented in the form of a cylinder, with a diameter of 1.8 centimeters and a height of 6.5 centimeters. Wha

> Its format, called "18650," indicates that it is presented in the form of a cylinder, with a diameter of 1.8 centimeters and a height of 6.5 centimeters. What a strange way to say express it. Why not say 18 millimeters and 65 millimeters?