UPS system with surge protection for electronic devices and computers. Battery-supported outputs and outputs with surge protection only. Reserved capacity and bridging time for connected devices that need to switch to UPS battery operation in an emergency; less critical devices are only protected against surges. LED status indicator provides a quick overview of the system and power supply status. Warning tones notify users when the status of the power supply or UPS system changes. Intelligent battery management: A smart precision charging system optimizes the performance, lifespan, and reliability of batteries. Notification of battery failure: Analyses for early detection of battery faults enable timely preventive maintenance. Automatic self-test: Periodic battery self-tests for timely replacement of depleted batteries.