That entirely depends on the power consumption of whatever is plugged into it. E.g., a small digital clock might be powered for hours, and a big desktop computer or flat-screen TV might only last a few minutes. You should determine the watt-hours of your UPS to the wattage of your "appliance", and then do the calculation.
9 years, 8 months ago
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Posted by:
Ken46
from
Somerset, NJ