It's not a good headline, if you read the article it is mentioned that the tested vehicles could only operate for 4 hours before "conking out". Which I can only assume means they are running out of charge. I would expect the charging time for these niche vehicles is not state-of-the-art and the infrastructure is poor, so that makes sense.
Thanks, I should of read it more thoroughly. Skimmed it instead, did a second pass and noticed a paragraph regarding vehicle charge longevity and the lack of charging stations.