Question about UPS Battery Backup Systems

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Nexxtech UPS Battery shows full charge but won't stay on

Nexxtech Ultimate Battery Backup 500VA. The surge only outlets work fine, but the Surge/Battery outlets do not. They test ok using software supplied but they power on for just a few seconds and then off again. The UPS shows 100% full charge.

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  • zjacobseth Feb 13, 2009

    Bad Unit? Just my luck.. Just bought it at Circuit City's liquidation sale.. "NO RETURNS ALLOWED".. :(

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  • 167 Answers

Had same problem! i discovered that the unit was defective,sorry if this is the case. good luck!

Posted on Feb 13, 2009

  • glenn hoffman
    glenn hoffman Feb 13, 2009

    do check the battery take it out and shake it, if you hear pebbles like sound, battery is dry, if not clean terminals with file or something like that. sorry you can't bring it back, that stinks! you can buy new batteries, something worth investigating. do like i said and best of luck!glen

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2 Answers

Apc hi800sq


follow this steps and fix it. God bless you
Plug the battery backup into a working electrical outlet. If the battery backup turns on when the power button is pressed, then the problem may be that the previous electrical outlet is faulty. Proceed to step three. If the battery backup doesn't turn on, proceed to step two.
  • 2 Reset the circuit breaker on the battery backup. APC battery backups have a labeled circuit breaker button located on the unit near the phone line, fax line, USB, network and coaxial cable inputs. Press the button to reset the circuit breaker. Power on the battery backup by pressing the power button. If the battery backup powers on, proceed to step three. If the battery backup doesn't turn on, proceed to step six.

  • Read more: http://www.ehow.com/how_7266444_troubleshoot-apc-battery-backup.html#ixzz2lwOvPO75
  • 3 Determine if the battery backup is charged and providing battery power. With the battery backup on and plugged into a working electrical outlet, plug a computer monitor into one of the battery backup outlets labeled "battery backup plus surge protection" on the battery backup. (APC power supplies have some outlets that provide only surge protection while the other outlets provide surge protection plus battery backup.) Turn the monitor on. Unplug the battery backup power cord from the wall outlet. If the monitor remains on, the battery is holding a charge, supplying electrical power and the battery backup is working properly. If the monitor goes off, proceed to step four.
  • 4 Charge the battery. Plug the battery backup into an electrical outlet and allow the battery to charge for 16 hours. This will fully charge the battery.
  • 5 Test battery charge. Once the battery is fully charged, repeat step three. If the monitor stays on when power is interrupted to the battery backup, the issue is solved and the problem resulted from an incompletely charged battery. If the monitor turns off when power is interrupted, the battery within the battery backup is faulty and needs to be replaced.
  • 6 Replace the battery backup unit. The unit itself is faulty. If the battery backup is under warranty, contact APC to request a replacement.
  • Nov 28, 2013 | UPS Battery Backup Systems

    1 Answer

    The UPS in this office is out of order, message that appear on screen is 'UPS V OUT LIMITS' and 'Battery critical'


    follow this steps and fix it. God bless you
    Plug the battery backup into a working electrical outlet. If the battery backup turns on when the power button is pressed, then the problem may be that the previous electrical outlet is faulty. Proceed to step three. If the battery backup doesn't turn on, proceed to step two.
  • 2 Reset the circuit breaker on the battery backup. APC battery backups have a labeled circuit breaker button located on the unit near the phone line, fax line, USB, network and coaxial cable inputs. Press the button to reset the circuit breaker. Power on the battery backup by pressing the power button. If the battery backup powers on, proceed to step three. If the battery backup doesn't turn on, proceed to step six.

  • Read more: http://www.ehow.com/how_7266444_troubleshoot-apc-battery-backup.html#ixzz2lwOvPO75
  • 3 Determine if the battery backup is charged and providing battery power. With the battery backup on and plugged into a working electrical outlet, plug a computer monitor into one of the battery backup outlets labeled "battery backup plus surge protection" on the battery backup. (APC power supplies have some outlets that provide only surge protection while the other outlets provide surge protection plus battery backup.) Turn the monitor on. Unplug the battery backup power cord from the wall outlet. If the monitor remains on, the battery is holding a charge, supplying electrical power and the battery backup is working properly. If the monitor goes off, proceed to step four.
  • 4 Charge the battery. Plug the battery backup into an electrical outlet and allow the battery to charge for 16 hours. This will fully charge the battery.
  • 5 Test battery charge. Once the battery is fully charged, repeat step three. If the monitor stays on when power is interrupted to the battery backup, the issue is solved and the problem resulted from an incompletely charged battery. If the monitor turns off when power is interrupted, the battery within the battery backup is faulty and needs to be replaced.
  • 6 Replace the battery backup unit. The unit itself is faulty. If the battery backup is under warranty, contact APC to request a replacement.
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    APC BACK-UPS ES 500VA fails to provide back up during power failure


    Get APC Powerchute Personal Edition for free and run it. If it says your battery isnt charged, check its voltage disconnected. Charge it with a car battery charger and see if its still a good battery. If not , replace it. If the battery is good, then check the charging voltage. Should be about 14 volts. if not, check the small transformer on the main board. Should be 120 in and 17 to 18 out. 4 diodes in a bridge for charge. The input to the transf has small fuse into it alone.

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    Three out of the five plugs do not work have stopped working.


    The APC UPS will power the non-battery (label something like surge only) with the power button turned off. If the outlets that are not powering up are labeled Battery/Surge, you need to turn on the UPS. There should be a button you depress to turn the system on.

    Also if this is a new UPS, you will need to hook up the battery for this to work. Open the bottom of the unit and you will find the battery and plugs.

    Jul 20, 2011 | APC Back-UPS Office 500VA (BF500) UPS...

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    APC will not stop making noise even after I


    Disconnect the battery(s) from inside. The backup batteries are still working...

    Mar 12, 2010 | APC Back-UPS Office 500VA (BF500) UPS...

    1 Answer

    Dynex Te685avr backup battery doesnt work


    The sealed batteries in these last about 6 years. You are correct in thinking that you may need a new one. Very easy to install. Here's a supplier of these: http://www.batteryinternational.com/dynex-te685avr-ups-battery-ups-batteries-f1.html

    Jun 02, 2009 | Dynex (TE685AVR) UPS System

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    Surge protectors


    No no need to charge there may loose contact between power cord and surge protecter or internal loose contact between sockets that can be removed

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    Dynex Te685avr backup battery doesnt work


    If the battery outlets do not work, typically the Dynex TE685AVR UPS (battery backup) just needs a new battery. These batteries usually last 3-5 years.

    The model of the battery is a WKA12-7.5F2 and can be purchased at: http://www.replacementupsbattery.com/Product_pages/wka12-75f2.html.

    Jun 26, 2008 | Dynex (TE685AVR) UPS System

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    Plugging an UPS into a surge arrester or plugging in a surge arrester into the UPS


    There should be no problem with what you are trying to do, one way or another. Just be sure not to overload your UPS (battery protected outlets). I myself have a power bar connected to my UPS to increase the number of battery protected outlets and everything works fine.

    May 31, 2008 | APC UPS Battery Backup Systems

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    CyberPower 325SL backup system


    How old is the unit and have you ever replaced the batteries?

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