Due to its small size, the button battery has been widely used in various miniature electronic products, ranging from 4.8mm to 30mm in diameter and thickness ranging from 1.0mm to 7.7mm. It is generally used as a backup power source for various electronic products, such as Computer motherboards, electronic watches, electronic dictionaries, electronic scales, remote controls, electric toys, pacemakers, electronic hearing aids, counters, cameras, etc.
Button batteries are also divided into chemical batteries and physical batteries, and their chemical battery applications are the most common. They are composed of an anode (positive electrode), a cathode (negative electrode), an electrolyte thereof, and the like. As shown on the right. Its appearance is stainless steel, and it is used as a positive electrode. Its negative electrode is a stainless steel round cover. The positive and negative electrodes are insulated by a sealing ring. The sealing ring is made of nylon. The sealing ring can prevent electrolyte leakage in addition to insulation. . There are many types of button batteries, most of which are named after the materials used, such as silver oxide batteries, lithium batteries, alkaline manganese batteries, and the like.