Question about APC Back-UPS CS 500VA UPS System

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Ups not working when on battery

When the ups is on AC it works fine but when the AC supply is off the ups will not supply power

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It sounds like your battery just needs to be replaced. It's easy to do and the batteries can be shipped right to your house. Check out http://www.batteryinternational.com/ups-batteries.html for a replacement battery.

Posted on Jun 23, 2009

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Posted on Jan 02, 2017

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Questions:
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2. Have you tried another AC outlet?
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