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Frequently asked questions
Networking & Wi-Fi>PowerReserve

JBL Bar Studio


Power Outage? Put your standard D-Cell batteries to work.

  • Provides backup power for your Verizon home voice service during power outages
  • Uses standard D-Cell alkaline batteries (Batteries not included)
  • Easy removal and replacement of discharged batteries
  • See Overview Tab for compatibility requirements

The PowerReserve will only provide power for Verizon voice service, including calls to 911. It will not provide power to your Verizon TV or internet service or cordless phones, home security systems, or devices that assist customers with disabilities.

Compatible with Fios.

    Let the PowerReserve keep your home phone running, even when the power’s not.

    Verizon Fios uses electricity to power your voice service. The PowerReserve device uses standard D-Cell batteries to provide up to 24 hours of power for your Verizon home phone service.

    Will the PowerReserve work for me?

    The Verizon backup power option available for your Fios service depends upon the Verizon equipment installed in your home. If your ONT (Optical Network Terminal - usually found in your basement or garage) is installed with a power adapter that looks like this image, then you've come to the right place to order a PowerReserve device as your backup power option.

    If your ONT is installed with a power adapter that looks like the image below, then your backup power option will be the Fios Voice Backup Battery.
    Battery Backup Unit

    For more information on the PowerReserve and other backup power options from Verizon please click here.

    Product photo may differ from actual product, however functionality remains as stated above.
    Specifications are subject to change without notice.

    Batteries not included.

    • Holds 12 fresh D-Cell alkaline batteries
    • Works for up to 24 hours before fresh batteries are required
    • Does not provide power to security systems, cordless phones, Fios TV, Fios internet or devices for customers with disabilities. Voice calls only.
    • Please store and handle all batteries in accordance with manufacturer’s instructions.

    Please dispose of old Duracell batteries properly. For more information about responsible recycling call 1-877-RECYCLE.

    Defective Equipment Return Policy:

    You may return any Equipment or Other Devices you purchased from us for any reason within thirty (30) days of purchase. Defective Equipment may be returned within one (1) year of Equipment purchase or activation, whichever is earlier. You must contact us to return any defective Equipment. If you return Equipment, we may replace it with a new or refurbished item, or we may refund payment for purchased Equipment.
    Go to for more details.

    Technical support:

    All technical support for this product is provided by Verizon.

    Product photo may differ from actual product, however functionality remains as stated above.
    Specifications are subject to change without notice

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    The Power Reserve provides backup battery power for your Fios Voice service if you have a compatible Fios ONT. You'll find compatibility details on this page to ensure it will work properly for your consumer or small business needs.