that sound interesting , if its on the road it dont do 4mph , mr Tracks E moped is supposed to do 15 mph but we know what boys get up to , and he always wears his helmet 
he has only had id a couple of weeks .... Tina x
the longest trip to date is 9 mile with the battery meter dropping from 4 to 3 .
dealers claim 20 plus mile dependent on terrain / weight carried .
it is not a mobility scooter , will post a review soom ... ST.