  We summarize results from a study of spherically symmetric collapse of a {\it
charged} (complex) massless scalar-field \cite{Hod}. We present an analytic
argument which conjecture the generalization of the mass-scaling relation and
echoing phenomena, originally discovered by Choptuik, for the {\it charged}
case. Furthermore, we study the behaviour of the self-similar critical solution
under {\it external} perturbations -- addition of a cosmological constant
$\Lambda$ and a charge-conjugation $e$. Finally, we study the scaling-relation
of the black-hole charge. Using an analytic argument we conjecture that
black-holes of infinitesimal mass are neutral or obey the relation $Q_{BH} \ll
M_{BH}$. We verify our predictions with numerical results.
