Already appeared on the market conversion kits that add conventional bicycle electric drive, but as a rule, they looked very awkward and clumsy.
This gadget is shown in kickstarter, is compact in size and do not require changes in bicycle design. It is easily mounted on the frame under the seat and is connected directly to the rear wheel. Power reserve after a two-hour charge will be 24 km. Price new $ 1,070.
Read another very interesting article about alternative energy of the Sun, water and air.