By Darcy

2 thoughts on “Free-energy: what the battery companies don’t want you to know”
  1. Avataaar/Circle Created with python_avatars Darcy Whyte says:

    It's explained in the link but it's the piezoelectric effect.

  2. Avataaar/Circle Created with python_avatars OVSPsk8strong1 says:

    So how does this work?

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