The battery (UPS) is a system device that connects the battery (mostly lead-acid maintenance-free battery) to the host and converts DC electricity into mains through the host inverter and other module circuits. It mainly provides stable and uninterrupted power supply to single computer, computer network system or other power electronic equipment such as solenoid valve and pressure transmitter.

Batteries are used in a wide range of fields, Including mining, industrial, communications, aerospace, defense, hospitals, computer terminal, network, server, network equipment, data storage equipment, emergency lighting system, railway, shipping, transportation, power plants, substations, power plant, fire security alarm system, wireless communication system, program-controlled switches, mobile communications, solar energy storage conversion equipment, control equipment and emergency protection Systems, personal computers, etc.

The UPS battery consists of a rectifier and charger, and an inverter that converts DC power into AC power. During normal ac power supply, the battery stores energy and remains at the normal charging voltage. If the mains power fails, the battery immediately supplies power to the inverter, thus maintaining the AC output voltage of the UPS power supply.