That may be true, but from the perspective of a company like Hertz they are covered by the standard 8 year warranties offered by most EV manufacturers because they do not keep cars that long anyway.

Idk how true this is, but I keep hearing that car batteries have gotten so good they are likely to outlive the car.

Anyways, these are rentals, which are usually sold after around 1 year/30,000-40,000 miles. So it's irrelevant for a rental car company if batteries last longer than that.

do batteries wear out in the lifetime of a rental car? I would think the batteries have a lifetime of at least 10 years whereas a rental agency only keeps the car for <4 years.

How long do rental places keep cars?