Power outages? No problem! Check out these 7 modern technologies that don’t require electricity, from solar calculators to gravity-powered lamps.
Mechanical watches rely on the energy produced by a wound spring. Because of their precision and longevity, mechanical watches have been used for centuries and are still widely used today.
The watch’s movement is driven by winding the spring, which stores the energy released when the spring unwinds. The mechanical movement’s quality, influenced by the watch’s design and the watchmaker’s talent, determines how accurate the timepiece will be.Another example of technology that does not require a connection to an electric power source is a wind-up radio. These radios are powered by a hand-cranked spring mechanism that powers a tiny generator to generate electricity.
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