Question about CyberPower 725SL UPS System

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Cyberpower 725SL Intelligent Back Up Power: This unit now just flashes on / off. When I press the red button and then back on again - it continues to flash on / off. I have tried plugging it into other outlets but same problem. any suggestions?

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It would appear that you need to replace the battery on this unit.
You could get a new battery from a local battery specialty store like Batteries Plus or Interstate Battery, or online at www.replacementupsbattery.com. A new battery would be about $30. If you took your old battery there, they could recycle your old one, as well as match it up with the correct one you would need (BP9-12 battery).
We have a 3 year warranty on all our battery back up units. If you have any questions, you could contact us here at CyberPower Systems Technical Support at 877-297-6937, M-F 8-5 Central, or email us at tech@cyberpowersystems.com.

Posted on Nov 18, 2008

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Hi there;

It's showing the classic signs of needing a new battery. You can find a new battery here: http://www.batteryinternational.com/cyber-power-cps725sl-ups-battery-ups-batteries-f1.html

To replace, unplug from wall, remove the six screws from the bottom of the unit and you'll see the battery inside. Disconnect and reconnect. Simple as that.

Hope that helps.

Posted on Oct 22, 2009

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Battery Back-Up not coming back on after power outage. Charged for several days without anything plugged in with trip button pushed in. Surge side still working. No beep light or anything on battery...


Does the unit have a breaker on the back? There may also be a fuse. You should be able to find a users guide on the CyberPower website.

If the unit may have failed during the power outage.

Jan 07, 2013 | CyberPower UPS Battery Backup Systems

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I have a CyberPower 725SL UPS. Shortly after turning it on, it will beep as if AC power was lost and the green light goes out. I checked the battery and it's good. I'm assuming something went bad with...


Couple different items to check.
  • Try letting the unit set ideal for overnight charging the battery. Do not even turn the unit on.
  • Replace the battery.
If you turn the unit on when the battery is plugged in and does not keep a charge you can almost be sure it is the battery or the charging circuit not maintaining the battery.

Nov 11, 2010 | CyberPower 725SL UPS System

1 Answer

What does wiring fault light mean?


The Site Wiring Fault LED will indicate three status:
• Led On: The site wiring fault function is enabled and a site wiring fault is present.
• Led Off: The site wiring fault function is disabled.
• Led Flash: The Site wiring fault function is enabled and there is no site wiring fault.

When the input power is normal the Site wiring fault LED will flash.
• To disable this function, press the Site wiring fault LED button for 10 sec when the UPS is plugged in to wall power and the UPS is off.
• To enable this function, press the Site wiring fault LED button for 10 sec when the UPS is plugged in to wall power and the UPS is off.

Is the wiring fault light indicator lit? This means that the outlet that the unit is connected to is either not properly grounded, or has reversed wiring. First, try connecting the unit to another outlet. If the unit does not display the wiring fault light in the new outlet you will need to have an electrician correct the problem with the other faulty outlet.If it still displays the wiring fault more troubleshooting will be necessary to determine the cause

Feb 09, 2010 | CyberPower 725SL UPS System

1 Answer

CP685AVR/BF685 Power Contro.


It is likely the battery. These batteries are designed to last 3-6 years in a UPS. The good news is that if it is the battery, it is completely user replaceable and you'll have a Cyber Power unit that works just like new with a new battery. What may have happened is that the battery was weak, and you may have had a slight dip in the AC power. This caused the Cyberpower unit to switch over to the weak battery which couldn't handle the load. The unit then turned off. When you press the "ON" button, the unit will go through a self-test that checks all of the components and the unit will not turn on and be functional unless all of the components come back with a PASS, including the battery. If possible, test the battery with a voltmeter, it should read around 13.5, but not lower than 11.5v DC. However, with the unit over 3 years old, it almost certainly the battery. Here's a link to a replacement battery for the CP685AVR: http://www.batteryinternational.com/cyber-power-cp685avr-ups-battery-ups-batteries-f1.html

Hope this helps.

Jun 28, 2009 | CyberPower (CP685AVR) UPS System

1 Answer

My UPS Cyberpower 725SL is blinking and clicking on and off


When the battery is low, or dead, on these it will act this way. You may want to try a new battery. Here's a supplier: http://www.batteryinternational.com/cyber-power-cps725sl-ups-battery-ups-batteries-f1.html

Apr 17, 2009 | CyberPower 725SL UPS System

2 Answers

Battery replacement


The batteries are very easy to replace on this model. You can simply remove 6 phillip head screws in the bottom and the unit will come apart to reveal the battery. Simple fast-on connectors. Here's a link to a new battery for that model: http://www.batteryinternational.com/cyber-power-cps725sl-ups-battery-ups-batteries-f1.html

Jan 27, 2009 | CyberPower 725SL UPS System

5 Answers

My computer won't boot and the CyberPower 825 AVR makes a continuous sound.


It sounds as though the UPS is not receiving power. Check that it's cable is properly plugged into the wall. Also verify that it's internal ground fault interrupter has not tripped, it's usually a little red button on the back of the unit, it should be pressed in and should stay that way, if it pops out then there is a problem with the ground of your electrical outlet. Also check that the breaker for that electrical has not tripped at your fuse box.

Since the UPS is not receiving power the batteries have discharged and that is why your computer cannot start, there is not enough juice from the UPS to boot it. That is also why it is making a noise as most UPS's sound an alarm to indicate that they are not connected to power.

There is a chance that the batteries in your UPS have gone bad or that something has become faulty in your UPS. Try plugging your computer and monitor directly to the wall bypassing the UPS to see if they work fine.

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2 Answers

Cyberpower 725sl


Yes, it would appear that you need to replace the battery on this unit.
You could get a new battery from a local battery specialty store like Batteries Plus or Interstate Battery, or online at www.replacementupsbattery.com. A new battery would be about $30. If you took your old battery there, they could recycle your old one, as well as match it up with the correct one you would need (BP9-12 battery).
We have a 3 year warranty on all our battery back up units. If you have any questions, you could contact us here at CyberPower Systems Technical Support at 877-297-6937, M-F 8-5 Central, or email us at tech@cyberpowersystems.com.

Mar 15, 2008 | CyberPower 725SL UPS System

2 Answers

Power is out


Tom, usually those can be replaced by the End User. It's rare that they'd be sealed inside, but that does happen at times. The big issue is finding replacement batteries of same type/size fit, and you'd need to do that online.

Feb 03, 2008 | CyberPower 725SL UPS System

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