I have a lady up here in I think it's Apex or fuquay varina that had at the time I worked on the car 425,000 miles on her original car and battery with that tan velor interior that was whistle clean too It was shocking and the car drove fine and didn't seem to have any problems I was putting a break actuator on it which after installed it worked great and the lady still drives that car to North Carolina State University every day as far as I know He's an employee there I don't think that's any kind of a record but so it can happen I wouldn't say it's typical All four of mine have had battery replacements at 200 and some change mileage
there were reports of canadian cabs hitting 600,000 miles. the key is that these batteries like being used a lot.
A generation 3 can make that kind of mileage in cab duty sitting at the house and sitting at the job all day not so much but if it's in the wind my ex is made 396,000 with no trouble it just kept stayed on the road and that's the reason I attribute that happening My persona no way it was going to driven back and forth to work use normally and it died a quick death at around 2:46.