The adaptive type starts with a bicycle and adds a drive system to it. Users of both types enjoy easy acceleration, hill climbing, and cutting through headwinds. Rechargeable batteries provide power for the electric drive motors. Charging costs less than 5 of electricity from common 110 VAC wall outlets. Charging times for different brands, however, vary widely.
People often ask the difference between a moped and an electric bike.
A moped has more of each. That range is plenty for errands and short commutes. An electric bike is the cleanest motorized vehicle on the market, both in terms of air pollution and noise. Regardless which type you use, you don't need a driver's license, vehicle registration, or insurance. Or buy a new bike that they're already ZAPped.