  The external matter stress-tensor supporting charged Vaidya solution appears
to violate weak energy condition in certain region of the spacetime. Motivated
by this, a new interpretation of charged Vaidya solution was proposed by Ori
[1] in which the energy condition continues to be satisfied. In this
construction, one glues an outgoing Vaidya solution to the original ingoing
Vaidya solution provided the surface where the external stress-tensor vanishes
is spacelike. We revisit this study and extend it to higher-dimensions, to AdS
settings, and to higher-derivative f(R) theories. In asymptotically flat space
context, we explore in detail the case when the mass function m(v) is
proportional to the charge function q(v). When the proportionality constant \nu
= q(v)/m(v) lies in between zero and one, we show that the surface where the
external stress-tensor vanishes is spacelike and lies in between the inner and
outer apparent horizons.
