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Old Apr 14, 2020 | 09:38 PM
  #14  
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Mark V8
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From: Essex
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Metal part is most probably a magnet, and the switch is inside the black part to keep it away from water.

https://www.explainthatstuff.com/how...tcheswork.html

I would have bet on 12 volts though

Last edited by Mark V8; Apr 14, 2020 at 09:44 PM.
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