Support Battery Backup

Battery Backup Information

If your home phone service is provided through our state-of-the-art fiber optic network it requires electric power to operate. Depending on your Verizon equipment, you have one of two backup battery options available for your Verizon voice service - either the PowerReserve or the Battery Backup Unit. With a fully charged battery in place, you will have up to 24 hours of backup battery power for emergency voice services, including Emergency 911 dialing, dependng upon your specific device.

Select your unit to get support

 
power reserve

PowerReserve

 
battery backup unit

Battery Backup Units

 

Frequently asked questions

  • An alarm will sound once a minute to alert you if the 12 volt battery in the battery backup unit (BBU) is not fully charged or has been drained completely. Your battery unit may look different from the one in the illustration below. The steps to mute battery beeping are the same for all battery backup units.

    How to stop the beeping

    Locate your battery backup unit then:

    • Press and hold the Alarm silence button for 10 seconds.
       
    • You should either hear a loud beep or the lights will flash on and off. If you did not get a beep or flashing lights, press and hold the Alarm silence button and the emergency use button together for 10 seconds.
       
    • The above steps will reboot your BBU and clear the alarm.
    BBU alarm silece buttons

    Note: The reboot will temporarily disrupt all your fios services and take between 3 to 5 minutes to complete.

  • When replacing your battery, please make sure to dispose of your old battery properly. For more information about recycling, you can contact Call2Recycle at 1.877.RECYCLE (1.877.273.2925) or visit call2recycle.org to find a list of the drop-off locations closest to you. You may also visit http://www.ehso.com/ehshome/batteries.php or call the EPA at 202.272.0167 for instructions. Your local municipality may also have information about proper disposal of batteries.

    Power and battery information is also available at verizon.com/about/terms-conditions/customer-notices in Spanish, Chinese, Korean and Vietnamese.

  • 12 volt 7.2Ah sealed lead acid batteryYou can purchase a new battery from Verizon by visiting verizon.com/FiosAccessories or you may purchase one from a third-party vendor. If you choose to purchase your replacement battery from a third-party vendor, please make sure that you are purchasing a 12-volt 7.2Ah SLA (Sealed Lead Acid) battery.

    Buy battery now

    Note: Only 12-volt 7.2Ah sealed lead acid batteries should be used in the battery backup unit. Batteries should be purchased just prior to replacement as 12-volt batteries may not maintain their shelf life when stored.

  • The steps to disconnect or replace the battery are the same for all battery backup units. Your unit may look different from the one in the illustration below. If you are having trouble accessing your battery, you can view detailed information on where to access your battery by unit type.

    View where to access your battery

    Important: Before you begin, unplug the battery backup unit power from your wall outlet.

    • After unplugging the battery backup unit from your wall outlet, open the battery compartment.
    • Remove the plug connector with the red and black cables by pinching and sliding it out of its location.
    • Gently disengage the retaining clips that hold the battery in place and remove the battery.
    • Disconnect the battery clips from the old battery and set the battery aside for proper disposal.

      If you are not installing a new battery, proceed to Step 8. Save the red and black cable for future use.
    • Remove the plastic covers on the black and red terminals of your new battery. Connect the battery clips to the corresponding black (- negative) and red (+ positive) terminals on the new battery.
    • Slide the new battery into the battery compartment, securing it underneath the retaining clips.
    • Insert the plug connector back into position. If the battery is installed correctly, you'll hear a beep and the battery power and system status lights will be solid green.
    • Replace the battery cover and plug the battery backup unit back into your wall outlet.

    Learn how-to disconnect and change your battery

    To better assist you with disconnecting and installing new batteries in your battery backup unit, we’ve created a simple two minute video that can walk you through each step.

  • If you have a backup battery, and do not have voice service through Verizon, or if you do not need voice service during a power outage, you can disconnect the battery.

    How to disconnect the battery
    The steps to disconnect or replace the battery are the same for all battery backup units. Your unit may look different from the one in the illustration below. If you are having trouble accessing your battery, you can view detailed information on where to access your battery by unit type.

    View where to access your battery

    Important: Before you begin, unplug the battery backup unit power from your wall outlet.

    • After unplugging the battery backup unit from your wall outlet, open the battery compartment.
    • Remove the plug connector with the red and black cables by pinching and sliding it out of its location.
    • Gently disengage the retaining clips that hold the battery in place and remove the battery.
    • Disconnect the battery clips from the old battery and set the battery aside for proper disposal.

      If you are not installing a new battery, proceed to Step 8. Save the red and black cable for future use.
    • Remove the plastic covers on the black and red terminals of your new battery. Connect the battery clips to the corresponding black (- negative) and red (+ positive) terminals on the new battery.
    • Slide the new battery into the battery compartment, securing it underneath the retaining clips.
    • Insert the plug connector back into position. If the battery is installed correctly, you'll hear a beep and the battery power and system status lights will be solid green.
    • Replace the battery cover and plug the battery backup unit back into your wall outlet.

    Learn how-to disconnect and change your battery

    To better assist you with disconnecting and installing new batteries in your battery backup unit, we’ve created a simple two minute video that can walk you through each step.