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Your cart is empty.Compatible Battery for Docsis 2.0, Docsis 3.0, Docsis 3.1 Gateway Cable Modems. Compatible with DPC3939 DPC3941T DPC3939 DPQ3925 DPQ3212 Modems
noelio nunez
Reviewed in the United States on August 17, 2024
La batería hace interferencia y corta la señal de Internet del Wi-Fi
sunny phillips
Reviewed in the United States on June 5, 2024
In addition, I had to pay to return the item. Will never order from this company again.
debora22
Reviewed in the United States on May 28, 2023
The battery fits the product described in the ad and works as advertised.Fits the new Comcast modem exactly...
GeneL
Reviewed in the United States on March 7, 2023
For the price and what it is supposed to do, good bargain. I had to look up the installation instructions online for the particular modem, but once I located those, easy. Per the literature, it will take 5 days for the battery to fully assume back-up power. Upon initial install, it has to cycle several time. What I don't know and probably will eventually find out is if the advertized back-up time is just from the time the power goes out, or does it refer to "talk time" while on the battery ? Like it says "8 hours". I can talk for 8 hours or even without talking, the battery will deplete after 8 hours ? Either way, fine with me. Would just use it for a couple of initial short calls.
2step2
Reviewed in the United States on July 30, 2022
I needed a battery for an older Wi-Fi router. I got exactly what I needed, and it was delivered 2 days before the promised date. Exceptional service. The battery is performing flawlessly.
craig foret
Reviewed in the United States on June 3, 2021
arrived sooner than expected !
akamaibuyer
Reviewed in the United States on June 18, 2021
This battery is for the phone line backup only in the event of a power outage. It will not power the internet on the Cisco DPC3941T model commonly used by Comcast Xfinity. For continuing internet service, you will need a APC Backup battery which can also backup computer and monitor during power outage. I was not aware of this as the product description was not specifically clear about this. Yes, phone service is essential during power outage, but nowadays with cellphone, cable phone is not as important. Internet is a must and this battery will not work.I only found about this after reading a note inside the package delivered, stating "Back Batteries only support the PHONE PART of the modem." This was never clear on the Amazon website's product description before I purchased this product. Buyer Beware!
William J Justice Sr
Reviewed in the United States on April 8, 2021
I got this for my elderly mothers cable modem, so that her phone will continue to work if she loses power.
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