i found once a link to a electro-bike (very expensive)
it was powered by NiMh, batts included into the frame
it was red ;)
power: i think 3 versions, 250Watt, 400Watt and 600Watt
it had no hub-motor
and for an untrained person not noticable, that it was an e-bike..
i can´t finde...