QuietRush
100 W
It also helps to think about the natural target market these guys are aiming for, megacities in Asia where they're choking in pollution. The scooter is already well established as a preferred transport mode there, with lots of people selling petrol by a litre bottle at a time in an unregulated industry. In that context, it makes a lot of sense. The weak point that I see in their offering is a DRM locked battery, which is an interesting bit of IP, though they're also considering secondary uses for it as a power source for other things. Article with a bit more depth and scrutiny is at http://www.theverge.com/2015/1/5/7484171/gogoro-smartscooter-electric-scooter-removeable-battery