Late-time evolution of charged gravitational collapse and decay of charged scalar hair. II

We study analytically the initial value problem for a charged massless scalar field on Reissner-Nordstr\"om space-time. Using the spectral decomposition technique we generalize the results of paper I for arbitrary charges. We show that the charged perturbations decay according to an inverse power-law behavior at future timelike infinity and along future null infinity. Along the future outer horizon we find an oscillatory inverse power-law relaxation of the charged fields. The charged dumping exponents decrease with the charge. The late-time charged tails are determined by multiple scattering of the field, a phenomena not found for neutral fields and in the weak electromagnetic interaction limit.