I was able to watch the "fomula E" race.....
interesting.... they looked like formula one, but the sound.... a high pitched whine for sure!
Only a 35 lap race, maybe 45 minutes. towards the end, they were showing the cars "energy level".... the winner crossed the finish line with "0.5%". Don't know how much that actually is, but they were all around that to 1%.
The cars also had braking regeneration (charging), if they didn't have that, I wonder if they would have run out of juice? I guess they don't have to worry about any long distances.
Definitely strange (as compared to normal formula 1 racing). Even the wifey mentioned how weird the sound was. They are 400KW motors, all wheel drive.