running when AC power is lost. The battery is charged by the AC power while it is
available, so when AC power is lost, the battery can provide power to the system for a
limited amount of time, depending on the UPS system.
UPS systems range in price from a few hundred dollars to several thousand dollars,
with the more expensive unit s allowing you to run larger systems for a longer period
of time when AC power is lost. UPS systems that provide only 5 minutes of battery
power let you conduct an orderly shutdown of the system, but are not intended to
provide continued operation. Surge protectors should be used with all UPS systems,
and the UPS system should be Underwriters Laboratories (UL) safety approved.
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