  We obtain a class of asymptotic flat or (A)dS hairy black holes in
D-dimensional Einstein gravity coupled to a scalar with certain scalar
potential. For a given mass, the theory admits both the
Schwarzschild-Tangherlini and the hairy black holes with different temperature
and entropy, but satisfying the same first law of thermodynamics. For some
appropriate choice of parameters, the scalar potential can be expressed in
terms of a super-potential and it can arise in gauged supergravities. In this
case, the solutions develop a naked curvature singularity and become the
spherical domain walls. Uplifting the solutions to D=11 or 10, we obtain
solutions that can be viewed as spherical M-branes or D3-branes. We also add
electric charges to these hairy black holes. All these solutions contain no
scalar charges in that the first law of thermodynamics are unmodified. We also
try to construct new AdS black holes carrying scalar charges, with some
moderate success in that the charges are pre-fixed in the theory instead of
being some continuous integration constants.
