Thanks for the info, but my laptop battery only lasts about 45 mins.
During Hurricane Ivan a few years ago, power went off about 4 hrs before the eye came over my house. I had a 12 volt TV running the whole time including days after on a car battery. Say La Vee. Its radio for me in the future.
I have two batteries for the laptop. One regular size and one heavy duty. It’s a smaller laptop. The bigger battery lasts 4-5 hours.