Using TV During Extended Power Outage? Options

Hi,

Would like to hear about options to have TV available during power outages. Thinking about outages for a day or two.

For example, would a portable power station be a way to power TV and cable TV modem and cable TV box connected to TV?

Anyone try those portable TVs that receive TV stations with antenna? (so won't get cable TV stations) ?

I see that xfinity offers a 'Storm-Ready' WiFi option, but that only works for up to 4 hours.

Any other options?

Greatly appreciate any and all input.

Thanks,

Mark