  In this paper, geodesic motion of the charged particles in the vicinity of
event horizon of Schwarzschild anti-de-Sitter black hole (BH) with topological
defects has been investigated. Weakly magnetized environment is considered in
the surrounding of BH which only effects the motion of the particles and
doesn't effect the geometry of the BH. Hence, particles are under the influence
of gravity and electromagnetic forces. We have explored the effect of magnetic
field on the trajectories of the particles and more importantly on the position
of the innermost stable circular orbit. It is observed that the trajectories of
the particles in the surrounding of BH are chaotic. Escape conditions of the
particles under the influence of gravitomagnetic force are also discussed.
Moreover, the escape velocity of particles and its different features have been
investigated in the presence and absence of magnetic field. Effect of dark
energy on the size of event horizon, mass of the BH and stability of the orbits
of the particles have also been explored in detail.
  These studies can be used to estimate the power of relativistic jets
originated from the vicinity of BH.
