Walter said:
Why, oh why, aren't I allowed to sue the patent office for gross negligence?
They're saying that the power comes from forced demagnetization of the
permanent magnets, which would eventually have to be replaced.
Essentially this is a magnetic flux battery where the energy input is
whatever was required to magnetize the material in the first place.
Whether a useful amount of energy can be stored in magnetic materials,
and whether the losses in the coils would be prohibitive without
superconductors, remains to be seen by whoever feels lucky enough to try it.