  We describe a new analytical model for the accretion of particles from a
rotating and charged spherical shell of dilute collisionless plasma onto a
rotating and charged black hole. By assuming a continuous injection of
particles at the spherical shell and by treating the black hole and a
featureless accretion disc located in the equatorial plane as passive sinks of
particles we build a stationary accretion model. This may then serve as a toy
model for plasma feeding an accretion disc around a charged and rotating black
hole. Therefore, our new model is a direct generalization of the analytical
accretion model introduced by E. Tejeda, P. A. Taylor, and J. C. Miller (2013).
We use our generalized model to analyze the influence of a net charge of the
black hole, which will in general be very small, on the accretion of plasma.
Within the assumptions of our model we demonstrate that already a vanishingly
small charge of the black hole may in general still have a non-negligible
effect on the motion of the plasma, as long as the electromagnetic field of the
plasma is still negligible. Furthermore, we argue that the inner and outer
edges of the forming accretion disc strongly depend on the charge of the
accreted plasma. The resulting possible configurations of accretion discs are
analyzed in detail.
