I have a 2021 Mustang mach E with the extended battery. I live in the Missouri and in the winter of 2021, I got 270 miles on a full charge and about 310 miles in the summer. The dealership had the car for about a week this year in which they updated the software. This winter, my battery is fully charged at 200 miles. Ford is telling them that is normal. I do not think so.