On Wednesday this week I drove 91 miles with 8 miles range still indicated on the battery, I have the Rex, but it was not used or needed I had 12% SOC left which I believe the guess o meter was underestimating the 8 miles left. So 99 miles or possibly calculating it should have indicated 12 miles left on 12% SOC. or another words 103 miles range. This was driving at 50 to 60 MPH on local state routes and thru local city traffic. Temperature was 80 deg F and the AC was on and set at 70 deg F. I never use anything but comfort mode. Now I have not run the Rex enough to know how much range it will add if needed. In 2518 miles the Rex has only been used about 159 miles.