Support XFINITY Voice Purchase a Battery for Your XFINITY Voice Phone Modem


A backup battery will ensure your phone service remains available to you for up to 8 hours in the event of an electrical outage. Please see the below section to order your backup battery today.

XFINITY Voice Unlimited Select and Local Select (Virginia & West Virginia Only) Customers: Backup batteries are not available for purchase from Comcast by Unlimited Select customers or Local Select customers.

Get a New Battery

A new battery may be purchased for $35.00 plus taxes and a $5.95 shipping fee. Existing customers are eligible to purchase a new battery, which will be sent to your Comcast service address and will arrive in about 7-10 business days. If you would like to order a battery, please call us at 1-888-972-1261. If you are a Comcast Business Voice customer, please call 1-800-391-3000 for details about the Comcast Business Voice battery replacement program.

For detailed instructions on how to insert the battery, please see Install a Battery Into Your XFINITY Voice Modem.

Note: If your device is equipped with 2 battery slots, only 1 battery is needed in order to receive up to 8 hours of backup power.

Recycle Your Used Battery

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

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