The charged Higgs boson is an inevitable particle in supersymmetric models, both in the minimal version and in extensions.
It is also a particle, which may have different decay channels depending on the scalar representations in the model, and thus it may help in identifying the model.
In this talk I will consider the simplest singlet and triplet extensions of the minimal supersymmetric standard model, and in particular, describe some smoking gun signals of charged Higgs at the LHC collider.
Then I will move on to supersymmetric left-right models, in which neutrino masses are naturally generated and which have several dark matter candidates, in addition to possibly solving both the strong and weak CP-problems.
I will discuss the charged Higgses, both singly and doubly charged, in such models.