An EVI power supply 650VA is a Line-Interactive Uninterruptible Power Supply (UPS) designed to provide backup power to electronic devices, featuring a 650VA/360W capacity, a built-in 12V, 7Ah battery, Cold Start function for startup without AC power, and Automatic Voltage Regulation (AVR) to protect against power fluctuations. It includes intelligent battery management for longevity, two universal outlets, and provides approximately 10-20 minutes of runtime depending on the load, enough for data saving and safe shutdown.