Comcast modem battery

"DPCSIS 3.0" is not a valid model number. Please see https://www.xfinity.com/support/articles/broadband-gateways-userguides for model numbers of Comcast gateway devices. 

Just a note that the battery on Comcast gateways only powers the phone service. It will not run the full Internet connection. You may be better off getting a stand-alone UPS and plug the gateway into that, as it will power the full gateway.

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@Gladysbullock4 wrote:

My modem  is XB3  Model DPCSIS 3.0  

I need a battery number to fit this modem.

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See this;

https://www.xfinity.com/support/articles/getting-a-new-battery

"currently priced at $165, plus tax."

WHAT?????? Car batteries are cheaper than that!! You can buy a full 1000W+ UPS with a big battery for less.

Yep...... 😞 That would be the preferrable way to go ! You can even plug your other equipment in to it.

Or buy a refurb modem that includes the battery at that price.

I have a backup battery and a UPS, but the connection and phone still goes out when the power goes out, as the local repeater on the pole does not have a backup