Support XFINITY Voice Battery Help


Your XFINITY Voice modem uses power from an external power source like an outlet. Your XFINITY Voice service – and any other devices that connect through your modem, like a cordless phone, home alarm, security, or personal emergency devices – may be disrupted if there is an electrical power outage.

Checking Your Modem's Battery

  • If the battery light on your modem is solid, your battery is in good health and is fully charged.
  • If the battery light on your modem is blinking, your battery may need to be replaced. If you have recently removed your battery and/or utilized your battery backup during an outage, the battery light will continue to blink until it is fully charged. Please allow eight hours for the charge to be fully restored.
  • If the battery light on your modem is out, your battery may be missing, depleted entirely, or not connected properly. Please visit Install a Battery Into Your XFINITY Voice Modem for instructions on how to properly install your backup battery.

(Unlimited Select and Local Select customers, please see the information provided below.)

The Convenience of Backup Power

A backup battery can be purchased and installed in your XFINITY Voice modem to provide additional hours of service during a power outage. Backup batteries are available for purchase. Visit Purchase a Battery for Your XFINITY Voice Phone Modem for more information on purchasing a battery. (Unlimited Select and Local Select customers, see information below.)

Note: If your modem has two battery slots, you will only need one battery in order to receive up to eight hours of backup power.

Unlimited Select and Local Select Customers (Virginia and West Virginia only): Service (including 911/emergency services) will not function during a power outage. A power outage will interrupt communication to and from non-voice communications equipment, including, but not limited to, alarm and security systems or devices, home detection devices and fax machines connected to Unlimited Select or Local Select.

Recycle Your Used Battery

For detailed instructions on how to recycle your used battery please visit Recycle Your Used Battery.

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