  In this paper, we consider the analogy of the Penrose process in Charged
Vaidya spacetime. We calculate the border of the generalized ergosphere, in
which the charged particles with negative energy might exist, and show that it
is temporary. We show that there are no closed orbits for particles with
negative energy inside the generalized ergosphere. We investigate the question
about the efficiency of the Penrose process and show that one can't extract
large energies from a black hole.
