To attribute an inertia to free space is not an option. It is soundly consistent with the fundamental laws of physics. The mechanical interpretation of electromagnetic phenomena would supply a concrete way of simplicity and unification. Consequently the revised quantum theory could become without any contrast a modern chapter of a removated classis physics. Here is proposed a new elementary charge model, which simplifies the interpretation of many phenomena, including the controlled nuclear fusion. A reinterpretation of Maxwell's equations and a comprehensive demonstration of the value of the classical Planck quantum is given.