What I had noticed was the Prologue gained 4 to 6 miles of range over night. Sunday night the range showed 89 miles. Monday morning it was at 96 miles. The temperatures were over 100 degrees during the day, and the cooling fan would run when we stopped the Prologue. I’m assuming that once the battery cools down, it can provide more drive energy and that shows up as a few extra miles when the battery cools off overnight.