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Automatic watch battery

Retrofit to make your cheap quartz watch automatic
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A lot of quartz watches use little button batteries to power them. A lot of fancy watches use a rotor to harvest the energy of flailing human limbs.

This device has the form factor of a standard watch battery button cell. Most of the interior is used to house an eccentric rotor, which charges the remaining stub of battery.

pocmloc, Jan 26 2018

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       How eccentric is this rotor?
Ian Tindale, Jan 26 2018
  

       Not as eccentric as you, [Ian].
pocmloc, Jan 26 2018
  

       funny, and with a piezoelectric ratchet and pawl
beanangel, Jan 26 2018
  

       In principle OK, but a radiothermal or Beta-capture cell would be way cooler* .   

       *In a metaphorical sense. Obviously, radiothermal batteries get quite warm in normal operation.
8th of 7, Jan 26 2018
  

       This could actually work. The available power would be (very roughly) dependent on the square of the diameter of the rotor - so maybe 1/20th that available from a conventional full-diameter rotor, but that's plenty for a quartz.
MaxwellBuchanan, Jan 26 2018
  
      
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