Question about APC APS BackUPS CS 650VA 400W 230V DB9 RS232USB (BK650EI) UPS System
This indicates the battery is worn out and will not provide power in the event of a mains power failure.
To test the battery, connect a computer or some other device to the output on the UPS, and connect the UPS to the mains supply. Turn on the mains power to the UPS and power up the computer, then turn off the main power to the UPS and if the computer switch off in a short time.
This proves the battery is old and needs to be replaced.
Posted on Mar 19, 2011
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Posted on Jan 02, 2017
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