If you’ve recently purchased an Xfinity Voice backup battery, find your modem or wireless gateway below and follow the simple, step-by-step instructions to install a new battery.
Installation instructions by equipment
Choose your modem model below to receive simple step-by-step instructions for installing a new battery. The Xfinity Gateway or modem model can be found on the front or bottom of the device.
- CGM4331COM/ TG4482A
- Arris TG852G/TG862G
- Arris TG3482G
- Arris TM402G/TM402P
- Arris TM502G/TG1682
- Arris TM602G
- Arris TM702G/TM722G
- Cisco DPC3939/3941T
- Motorola SBV5220
- Scientific Atlanta DP2203C
- SMC Networks SMCD3GNV
- Technicolor TC805C
- Technicolor CGM4140COM
- Technicolor CGM4981COM
- Thomson/RCA DHG535
- Thomson/RCA DHG536
- Ubee DVM3203B
Need help?
If you need technical assistance with your battery, please contact us from your mobile phone and we'll take you step-by-step through the directions.
Note: If your Xfinity Voice modem is equipped with two battery slots, only one battery is needed to receive up to 24 hours of backup power.