  Force-Free Electrodynamics for black holes in Anti de Sitter is considered.
We present new, energy extracting solutions of Force-Free Electrodynamics in
Anti de Sitter - Near Horizon Extremal Kerr and Super-Entropic Near Horizon
Extremal Kerr geometries. The relevant equations of motion are derived from an
action for force-free plasma surrounding spinning black holes with generic
asymptotics. We consider the energy flux of electrodynamic fields in rotating
frames to argue that the correct measure for energy extraction is the energy
flux measured by a rotating observer in the near horizon region. We illustrate
this procedure by application to near horizon solutions in Kerr, AdS-Kerr and
BTZ.
