An electronic watch comprising a timekeeper logic unit (42) set to control a display (50,54) of the time, and a controller (48), in communication with an external device (90) or with Internet (99) through a wireless interface (68) of the watch, and a mechanical energy harvester system (25) set to transform mechanical energy deriving from the movements of a wearer to electrical energy, a power manager circuit for storing the electrical energy in a battery (30) and/or in a capacitor (32), and to supply the logic unit (42), the controller (48) and the wireless interface (68) with energy stored in the battery (30) and/or in the capacitor (32).
