Mini ups for netgear orbi

so if you have power outages that last roughly 2.5 hours and you need to power an orbi plus I assume a modem as a router does no good without a modem to provide internet. At the high end thats roughly 105 watts power (3.5amp * 12 volt *2.5 hours) over that period for the router. Not sure what your running for a modem but if you figure a CM1000 which would require 75 watts over that same period (2.5amp * 12 volt * 2.5 hours). that puts you at needing roughly 180 watts of power. You'd be better to buy a small sized full UPS to run your modem and router during these periods. Amazon basics sells a 255 watt back up power supply that'd meet your needs and its $40. Might be worth going that route and not having to worry about splicing cables or other issues with using a 12v power supply backup.  Even if you don't need a modem, a decent small ups that hooks up via the standard plug is probably a good idea anyway.

https://www.amazon.com/AmazonBasics-Standby-UPS-400VA-Outlets/dp/B073Q48Z95/ref=sr_1_3?keywords=ups+router&qid=1553390111&s=gateway&sr=8-3

Just my thoughts.