Question about CyberPower 525SL (CPS525SL) UPS System

1 Answer

CyberPower 525SL Failure

During a thunderstorm my backup started beeping and blinking and my monitor and printer kept going off and on. I was able to shut everything down and it is all working properly, however, my backup continues to act up. I unplugged it and plugged it back on and when I power it up the power on light blinks on and off and it beeps. Is it useless at this point? Do I need a new one or is there some way to fix this. I tried the little button on the side which I thought might be a reset button but it does nothing. Please advise.

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  • Littleraine Jun 12, 2008

    My system went down during a bad thunderstorm. Now all it dose is beep and the green light comes on and off.

    What went wrong

  • Anonymous Nov 16, 2008

    but the replacement cells are hard to find.
    is this system too old?

  • sylg Jan 17, 2009

    I bought the cyberpower 525sl in August 2003. I only paid $54.00 for it and it has been great but a few times lately it has had a long beep and it clicks off. I usually can retry and it 'takes' but after reading similar problem here. I see that I am not alone. The suggestion of buying a new gel battery sounds like a saver. I am in the Orlando area and wonder if anyone knows a dealer who would carry a gel battery for this.

    Regards, Syl



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The erratic behavior and beeping could indicate that the Gel battery inside your UPS needs to be replaced, and is usually less expensive to replace than the entire UPS. You can remove the battery and contact a local or online source for a replacement. I replace mine through a local automotive battery supplier, and it' never cost me more than $20.00.

Posted on May 24, 2008


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Hi droger68,

The reason for the issue that you have right now with your Cyberpower 525SL is a bad battery. This means that some of the battery relay's component or relay has failed. You may contact the manufacturer if it's still under warranty. If not you may check this site they do have battery for your machine.

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Feb 07, 2011 | CyberPower 525SL (CPS525SL) UPS System

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I've had the CyberPower for a while now and the product burned out on me. Was there a recall on it? The model number is CPS525SL.

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Nov 08, 2010 | CyberPower 525SL (CPS525SL) UPS System

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Unit does not back-up (stay on-line at all) when power goes out.

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Apr 16, 2009 | CyberPower 525SL (CPS525SL) UPS System

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Cbyer power 525Sl keeps turning off and on and beeps.

I have the exact same issue with my 525SL.
When you push in the red button - the green power light comes on for about 5 seconds = then the light goes out and the device plays a single long beep for about 5-8 seconds.

Given the dialogue here - I took out the battery and bough a brand new BB replacement battery and returned it into the unit as it should. The device continues to have the same behavior.

So it is NOT always a new battery that will fix the system.
Don't jump into spending $30.00 for a replacement.
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Joel Gerlach
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877-297-6937 x7917

Jul 03, 2008 | CyberPower 525SL (CPS525SL) UPS System

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Turned off my system

Well, it did just what it's supposed to do, protect your system from bad power. You probably had a power failure during the thunderstorm and your UPS shut down your PC. When you turn it back on the battery was too low and it shut off you PC again.Check your UPS software in windows, you should have an option to run a self test. But it should be just fine.


Jan 11, 2008 | CyberPower 325SL (CPS325SL) UPS System

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