A portable, light-weight, electrically powered device that derives at least part of its power from manual mechanical input means having a rotatively mounted battery which provides electrical power but also acts as an mechanical inertial storage mechanism. The kinetic energy of the moving battery is capable...http://www.google.fr/patents/US5905359?utm_source=gb-gplus-shareBrevet US5905359 - Combination flywheel and electrical storage cell and method of use
Combination flywheel and electrical storage cell and method of use
