  We use the Einstein energy-momentum complex to calculate the energy
distribution of static plane-symmetric solutions of the Einstein-Maxwell
equations in 3+1 dimensions with asymptotic anti-de Sitter behavior. This
solution is expressed in terms of three parameters: the mass, electric charge
and cosmological constant. We compare the energy distribution to that of the
Reissner-Nordstrom-anti-de Sitter solution, pointing to qualitative differences
between the models. Finally, we examine these results within the context of the
Cooperstock hypothesis.
