Hydrogen vs. Battery Electric Cars

You mentioned the battery degrading over time.  Well that's not that important.

First you need to look at how the battery is cooled.

If you look at the Nissan Leaf this don't do battery thermal management at all.   It's basically the best example of doing the worst possible thing.  The Nissan Leaf has been around for just over 10 years, and many of the early cars were used as Taxi's.

So the Nissan Leaf is a good example of doing the worst possible thing and you get about 80-90% of battery power after 10 years.  So by doing the worst possible thing you will loose 10-20% of the capacity.

All other electric cars that are being manufactured now are with battery thermal management this includes the Zoe which has also been around for about 10 years.  And so we know that you loose between 5-10% of the capacity in a electric car with a battery thermal management system.  So you have 90-95% of the range after 10 years, that is not a problem.