Hey guys, I've recently learned that magnetism is an electric field viewed from a different frame of reference and that the mathematics of electrodynamics describes this. However something raised my eyebrow which I wasn't quite clear on. If energy is put into a net flow of electrons, the energy is conserved within the electrons until it dissipates into neighboring particles via friction. However what is putting the energy into the Length Contraction creating the charge imbalances for the resulting magnetic field? To me it appears that the phenomenon of relativity is inputting energy into the length contraction causing the charge imbalance. This shows that whenever there are net flow of electrons there is energy coming from a different source. Does this mean there may be a way to harness energy from relativity? Thanks.