How do kinetic watches work?


Quick Answer

Kinetic watches transform the kinetic energy of movement into electrical energy, using that energy to run the mechanism of the timepiece, according to Seiko. A weight inside the watch moves whenever you move your wrist, spinning a tiny generator to create current. This electricity runs the mechanism of the watch and eliminates the need for replaceable batteries or winding.

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How do kinetic watches work?
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Full Answer

Unlike self-winding watches, which use kinetic energy to re-wind the tension spring mechanism that keeps the timepiece running, kinetic watches involve electricity. Stored electricity conducts through a quartz crystal, creating a vibration that maintains the timing of the gears inside the watch. Quartz timepieces are more accurate than mechanical ones, losing only a few seconds over the course of a month rather than minutes. Miniaturization and technological advances have reduced the amount of power needed to run this system to a micro-watt or less, making it possible to generate this electricity simply through incidental body movements. If a kinetic watch remains stationary for a long period of time, the internal battery may run out of power to run the mechanism, but simply shaking the watch for a few moments should introduce enough charge into the system to get things running again.

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