I have been doing some research on the topic of Torroidal Power Units or TPUs and have found some incredible (and yet credible and verified) claim of people who developed a way to tap the magnetic field of the earth to generate a virtually limitless amount of power.
From what I can gather, a torroidal generator is in effect a transformer of a different design. It acts like a superconducting magnet found in MRI scanners in that electrons move around the ring of the toroid continuously under their own intertia which generates a shifting electric and magnetic field that is able harness the earths own magnetic field.
It has been known for decades that electric motors or transformers that start up experience a 'kick' from the magnetic field of the earth leading to a higher output than input voltage. The kick quickly dampens down as new fields are established though. The mechanism behind the torroidal power unit though is repetition of the kick effect by setting up a resonant frequency inside of the torroid. First, second and third harmonics of the frequency are added to increase the amplitude where the peaks coincide thus increasing the output voltage considerably. The torroid then sustains and continuously feeds itself from external magnetic fields, much like a small particle accelerator will accelerate particles around a ring.
A lot of the ground work was laid by Tesla with his experiments for the wireless distribution of transverse electric power. I find it strange that people are only now developing technologies like wireless charging for electronic devices since the technology to do so has been around for over a hundred years already.
In any case. I urge you to search the web for Torroidal power unit, torroidal coil or TPU and see what you find. It is really astonishing.