For applications where shutting down is not an option, many network and mission-critical UPS systems support increasing battery capacity to extend runtime from minutes to hours. Automatic shutdown is also available for unattended computers. In the event of an extended blackout that exceeds the backup runtime of the UPS, battery backup provides an opportunity to shut down computers properly and prevent data loss.
Each UPS product information page at provides access to estimated runtimes for the entire range of wattages the UPS can support. Runtime varies depending on the size of the UPS battery and the wattage required by the connected equipment, as well as factors like efficiency, room temperature and battery age. The battery backup runtime of the UPS is the estimated time it will keep connected equipment powered during an outage, without an opportunity to recharge its batteries. During an outage, the UPS system keeps connected devices functioning by supplying electricity from its internal battery.
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