Question about APC Back-UPS 300 UPS System
When you unplug it all it does is make a alarm sound and does not provide backup power.
Many times the battery is bad. But before you invest in a battery,test the battery. Volt meters are cheaper than batteries and everyone should have one, or a friend that does. It will show you if the battery is dead. And if it is you can test if the UPS is charging it or not at the battery terminals. This way you won't waste money on a battery for an ups with a bad circuit board.
Posted on May 05, 2009
Change the battery
Posted on Jul 22, 2008
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Posted on Jan 02, 2017
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