This addendum expands the photon-centric model of electricity to address magnetic field formation, inductance, and the behavior of key circuit components like resistors, capacitors, and transistors. It introduces photon scattering, branching, and dynamic interactions as mechanisms for energy transfer and redistribution. By framing photons as the drivers of current and energy continuity, the model resolves ambiguities in classical electromagnetism, such as circuit continuity in capacitors and the origin of magnetic fields. These extensions remain consistent with observed phenomena and suggest experimental avenues to validate the photon-centric framework while offering insights into its theoretical and technological implications.