I have a 2015 Fusion Energi Titanium with 32,000. Dittos that the original new-car full-charge indication was 21 to 22 miles. Since then, full-charges have declined to an indicated 13-14 miles. A Ford Service Manager says the "indicated full-charge" is based on "averaging" of driving habits, which in my case, is a combination of freeway and street. He stated that one or more batteries are not defective, and that the "averaging" is the result of a computer algorithm. Consequently, without resetting the computer, then I can assume that I could raise the "average" indicated charge of 13-14 to 21 miles if I drove on a flat road only 45 mph until battery exhaustion at approximately 21 miles? Consequently, is my analysis correct to raise the the indicated mileage from 13-14 to closer to 21 subsequent to a full battery charge?