  We study analytically the asymptotic evolution of charged fields around a
Reissner-Nordstr\"om black-hole. Following the no-hair theorem we focus
attention on the dynamical mechanism by which the charged hair is radiated
away. We find an inverse power-law relaxation of the charged fields at future
timelike infinity, along future null infinity and an oscillatory inverse
power-law relaxation along the future outer horizon. We show that a charged
hair is shedd slower than a neutral one. Our results are also of importance to
the study of mass inflation and the stability of Cauchy horizons during a
dynamical gravitational collapse of charged matter to form a charged black-hole
