4 ms·

electricity

• yannis 17y ago
  Free electricity!
  • joeyo 17y ago
    Solar cells over back tire, then?
    • abalashov 17y ago
      The energy ROI on that surface area of photovolcaic cells would not make that feasible.
  • GiraffeNecktie 17y ago
    You certainly don't need free electricity. Even if electricity is relatively expensive in your area (as it is in China) the amount of electricity needed for running an electric bike (as compared to the operating costs for a car) is trivial. What you do need are good rechargeable batteries - and those batteries will eventually need to be replaced.