The storage battery is an important part of electrical equipment such as UPS, EPS, DC power supply, etc. The running state of the battery will directly affect the overall performance of the electrical system. The timely detection and elimination of potential hidden dangers of the storage battery are of great significance for ensuring the safe and stable operation of production equipment. The valve-regulated sealed lead-acid battery is widely used as a backup power source for electrical systems. This article introduces the operation and use of battery detection tools, conventional battery detection methods, battery maintenance techniques and fault prediction methods.