Hello, I have my Fusion Energi only about 4 weeks now and charging with the 120v charger is not charging to the full charge to have a range of 21 miles. I have charge it overnight everynight sense and the range says only 17 mile at full charge. Does any one know why or how to fix this. I charge on average 10-11 hours a night. it would seem it should take a full charge by then. Inside on the ecoscreen it says full charge Battery @ 100%. What am i doing wrong?