  In this paper, we study the inverse scattering of massive charged Dirac
fields in the exterior region of (de Sitter)-Reissner-Nordstr\"om black holes.
First we obtain a precise high-energy asymptotic expansion of the diagonal
elements of the scattering matrix (i.e. of the transmission coefficients) and
we show that the leading terms of this expansion allows to recover uniquely the
mass, the charge and the cosmological constant of the black hole. Second, in
the case of nonzero cosmological constant, we show that the knowledge of the
reflection coefficients of the scattering matrix on any interval of energy also
permits to recover uniquely these parameters.
