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I looked up the page and it gets worse.
You will need to shop for a car inverter. Find one that is at least 1,500 watts, and it will help you power your refrigerator for up to five hours—usually without damaging your car battery. Considering how much food we keep in our refrigerators, a $200 car inverter is a bargain!
I mean that's the least wrong part imo. I've ran a fridge off of a car battery and if it starts cold you can go a lot longer than that.
Or spend twice that and get a cheap generator that will actually power your frig and other stuff for more than a few hours.
Nah, it's definitely easier during a tornado to go outside, jack up my car, remove the wheel, remove the wheel liner, and then pull the battery from inside the bumper because that's a really convenient place to keep a car battery. Then I just have to lug the battery inside, hook it up, and keep 2 small children and 3 dogs away from it. Much easier than a generator.
Another source says they hold around 700 Wh. So not even 30 minutes actually
If your fridge uses 1.4KW you need a new fridge.
Nah if the fridge starts cold and you aren't constantly opening the door you can easily get 5 hours on a car battery.