APC® Back-UPS® ES 550 VA Battery Backup System

Battery-protected and surge-only outlets reserves power capacity and run time for connected equipment that require battery back-up. Power conditioning protects connected loads from surges, spikes, lightning, and other disturbances. Audible alarms provide notification of changing utility power and UPS conditions. Automatic battery self-test ensures early detection of a battery that needs to be replaced. Cold-start capable for temporary battery power when the utility power is out. Hot-swappable batteries delivers clean, uninterrupted power to protected equipment while batteries are being replaced. Resettable circuit breakers allows for quick recovery from UPS overload events. Transformer-block spaced outlets lets you use large input transformers without blocking access to other receptacles. Battery replacement without tools for maximum convenience.