Following the lectures by Anne Franzen and motivated by the Strong Cosmic Censorship Conjecture, in the presence of a positive cosmological constant, we give a sufficient condition, in terms of surface gravities and a parameter for an exponential decaying Price law, for an energy of solutions to the wave equation to remain bounded, up to the Cauchy horizon, in the black hole interior of Reissner-Nordström spacetimes. This is joint work with Anne Franzen.

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