When the lights went out today I noticed my UPS battery didn't work.
I checked the monitor and this is what I see:
As you can see it says the battery has 90% but when I pull the plug, it doesn't work.
Is there a way I can fix this or find out if the problem is battery or UPS?
This is my UPS model
I bought this FEB 2012, so it's about 1yr8mo.
I only noticed the problem now because it's only now there's been power interruption.
Best Answer
UPSes (particularly inexpensive ones, but many expensive ones are as bad) are notorious for having terrible charging behavior that kills batteries.
To address the comments that you might be overloading it, plug in a small load like a desk lamp. If it still doesn't work, the battery is toast.
You can replace the battery, and it will probably work for a while. Odds are, in another 18 months (or less) the new battery will also be toast. The more I use the things, the less I like them, for exactly this reason. They are very expensive to own when you have to feed them new batteries every year or two.