  It has recently been shown that the strong cosmic censorship conjecture can
be violated by the massless neutral scalar field in the nearly extremal
Reissner-Nordstrom-de Sitter black hole. However, the formation of such a black
hole by gravitational collapse necessitates the presence of the charged sector
on top of the Einstein-Maxwell system. Thus we numerically calculate the
quasi-normal modes for a massless charged scalar field in the
Reissner-Nordstrom-de Sitter spacetime by generalizing the characteristic
formulation to the charged case. As a result, the strong cosmic censorship
turns out to be recovered by our massless charged scalar field except in the
highly extremal limit $Q\rightarrow Q_m$, where the violation still occurs when
the scalar field is appropriately charged.
