The Smart-UPS On-Line provides protection for servers, voice/data networks, medical laboratories, and light industrial applications with high density and double conversion. The Smart-UPS On-Line can be used as a rack or tower. The lithium-ion batteries enable higher performance at elevated temperatures and a longer lifespan for the UPS. When mission-critical applications require runtime measured in hours rather than just minutes, the Smart-UPS On-Line can be configured with multiple battery modules to meet these extreme autonomy time requirements. Its LCD display continuously shows essential parameters such as operating mode, system parameters, and alarms. For computer management, a USB and an RJ-45 serial interface are available. The included PowerChute software allows for convenient monitoring and control, safe operating system shutdown, and innovative energy management features. With the SmartSlot for management cards, you can further expand the device's functions according to your needs. Analyses for early fault detection enable proactive component replacement. The device performs automatic self-tests and notifies you if the power status changes or if a battery needs to be replaced. The battery modules are easy to connect and can be swapped out while the system is running.