If I recall, Hertz requires 80% which is still terrible, considering the low range of some of their vehicles and that DC fast charging above 80% gets much slowe

If I recall, Hertz requires 80% which is still terrible, considering the low range of some of their vehicles and that DC fast charging above 80% gets much slower against all that voltage pressure. So you can double your total charging time to get to 100% (accelerating battery wear in the process) or charge to 85% and hope that the 10 miles to the airport won't take more 5%.