When I got the car it said 273 max, but I know it's officially 272. When I used my 500 free fast charging miles it went from 273 to 272 on the first charge. Then after a couple more times it was 271, then just now max is 270. I have 1197 miles on the care now. Is this because the fast charger is hard on the battery? It charges fast but really slows down after 80%. Should I drive it closer to 10% charge then charge at home where it charges slower? I realize the stated range at the top of the screen isn't really accurate so maybe it just recalibrates reality at the fast charger.