At some point this winter (maybe during the current cold snap) I’ll run my LEAF as hard as possible (freezing temps, heater & AC on, lights, 80MPH, etc) and see how the mileage drops. Running worst case, I expect no less than equivalent of 50 miles for a full charge.
My estimated full range frequently nears 100 miles. Question is whether you drive for performance or distance.
Can’t you just get a heater for the car, to warm up the battery?