> Renault concept goes 626 miles on single charge at motorway speed

On a real highway or on a test stand ? /s

The question is how much of this "single charge" is available in real conditions.

This is interesting but there isn't any battery breakthrough here, and I don't think many people would accept losing cargo capacity/passenger seats and potentially safety features just to be able to charge every 800 km instead of 400 (they would pay less in electricity though).