The T25 does not feature a battery backup, however you can utilize

Arris T25 vs SB8200 DOCSIS 3 1 Cable Modem is optimal for cable internet speeds up to 1 Gigabit per second. Note that a second IP address from your cable internet provider is required to achieve 1 Gbps. 32 downstream x 8 upstream bonded DOCSIS 3.0 channels; 2 downstream x 2 upstream OFDM DOCSIS 3.0 channels. There are two 1-Gigabit Ethernet ports.

Compatible with Xfinity internet and voice service not certified for usage with other cable providers 32 downstream x 8 upstream DOCSIS 3 0 channels; 2 downstream x 2 upstream OFDM DOCSIS 3 1 channels. Two 1-Gigabit Ethernet ports and two Telephony ports for digital phone service from Xfinity.

32 downstream x 8 upstream bonded DOCSIS 3.0 channels; 2 downstream x 2 upstream OFDM DOCSIS 3.0 channels. Dual 1 Gbps Ethernet ports Incompatible with AT&T, Verizon, CenturyLink, and other DSL and Fiber providers needed cable internet service; Does not contain WI-Fi and does not support cable digital voice service.

This is not a WiFi access point, but only a modem. Few gadgets support Wifi6, as it is still in its infant stages. You would be completely unaware of the benefits. Prices will decrease if you wait till WiFi 6 is introduced. This device is a cable modem and will only function if you subscribe to a cable internet service provider. It does not work with Verizon Fios.

The T25 does not feature a battery backup, however you can utilize an external UPS power supply in the event of a power outage. Compatible with Xfinity internet and voice service not certified for usage with other cable providers 32 downstream x 8 upstream DOCSIS 3 0 channels; 2 downstream x 2 upstream OFDM DOCSIS 3 1 channels. Two Gigabit Ethernet ports and two telephony connectors for Xfinity's digital voice service. Ideal for Xfinity internet plans with speeds up to 1 Gigabit per second; Xfinity internet service required. NOT included: wireless router

DOCSIS 3 1 Cable Modem is optimal for cable internet speeds up to 1 Gigabit per second. Note that a second IP address from your cable internet provider is required to achieve 1 Gbps. 32 downstream x 8 upstream bonded DOCSIS 3.0 channels; 2 downstream x 2 upstream OFDM DOCSIS 3.0 channels.

Dual 1 Gbps Ethernet ports Incompatible with AT&T, Verizon, CenturyLink, and other DSL and Fiber providers Cable internet access is required; WI-Fi is not included and cable digital voice service is not supported.