Since the energy equation is incorrect, relativity must be incorrect, because it depends upon the energy equation. Relativity indicates that as velocity increases, mass, time and distance change. It is not valid to alter such basic properties, because they must be used as yardsticks to measure with. Volts and Watts. With corrected definitions, voltage is a field, not a force.
Watts correlate with units of force.
Just as a mass must enter a field of gravity to create a force, electrons must enter a field of voltage to create a force. The number of electrons per second times the voltage determines the watts of force, which is the rate of energy addition. Electrons per second would be similar to mass per unit time in a field of gravity, because masses would be transient, and forces would be changing, in a large scale system of gravity. Force is Energy. Force and motion are interchangeable forms of energy.