Lithium primary battery manganese dioxide uses metallic lithium as the negative electrode and heat-treated manganese dioxide as the positive electrode. The isolation membrane is made of PP or PE film. The cylindrical battery is the same as the lithium-ion battery separator, and the electrolyte is an organic solution of lithium perchlorate, cylindrical or buckle type. Batteries need to be produced in a dry environment with a humidity of ≤ 1%. Features: Low self discharge rate, annual self discharge can be ≤ 1%, fully sealed (metal welded, lazer seal) batteries can meet a lifespan of 10 years, and semi sealed batteries generally have a lifespan of 5 years. If the work control is not good, this lifespan cannot be reached. Yiwei, which has done a good job in the development of cylindrical lithium manganese batteries, has achieved automated production, and the batteries can achieve tests such as short circuits and over discharges without explosion. Generally, on the motherboard of desktop computers, there is a button type lithium battery that provides weak current and can be used normally for about 3 years. Some hotels also use lithium manganese dioxide batteries for access cards, instruments, and meters, and their usage is decreasing year by year. Sulfonyl chloride is a cylindrical battery that uses lithium metal as the negative electrode, sulfuryl chloride (sulfoxide chloride) as the positive electrode and electrolyte. It is charged upon assembly and has a voltage of 3.6V. It is one of the most stable types of batteries with the highest capacity per unit volume (mass). Suitable for use on electronic instruments and equipment that cannot be frequently maintained, providing subtle currents. Other lithium batteries include lithium-ferrous sulfide batteries, lithium-sulfur oxide batteries, etc. With the development of microelectronics technology in the 20th century, the application of batteries has led to an increasing number of miniaturized devices, placing high demands on power supplies. Lithium batteries have subsequently entered a large-scale practical stage. The earliest application was lithium-ion rechargeable batteries, which were used in cardiac pacemakers. Due to the extremely low self discharge rate of lithium-ion batteries, the discharge voltage is very gentle. Making it possible for pacemakers to be implanted into the human body for long-term use. Lithium manganese batteries generally have a nominal voltage higher than 3.0 volts, making them more suitable as integrated circuit power supplies and widely used in computers, calculators, and watches. Lithium ion batteries are widely used in mobile phones, laptops, electric tools, electric vehicles, street light backup power supplies, aviation lights, and household appliances, making them the largest application group