At this sort of speed one of the worries about electric cars may be removed but whether they are the right solution to the problem is still a question, and until there is real impetus to creating the infrastructure that supports them fully, it might be moot anyway
https://www.bbc.com/news/articles/cz9dp3ye77do
The article says this:
The sports car the Nyobolt battery was fitted to - which was tested over two days this week - achieved a range of 120 miles after four minutes
120 miles is about half of what it needs to be and the car is a small sports car so the battery to achieve that is probably quite small too.
It sounds like it does represent an improvement but not the apparent five times better.