With the acceleration of China's urban modernization, the reform of energy prices, such as water, heat, electricity and gas, has been the focus of the Central Economic Work Conference in recent years. Intelligent water gas heat and power meter is widely used because it can realize the functions of real-time energy measurement, remote meter reading, remote payment, etc. Lithium sub battery or lithium manganese battery is generally used as working and backup power supply in these instruments. At the same time, intelligent instruments such as flowmeters and gas testers are gradually switching to disposable lithium batteries to meet the requirements of long life. It can be said that the future development of intelligent instruments will have an increasingly close and inseparable relationship with disposable lithium batteries.