  We have examined the thermodynamic properties for a variety of spherically
symmetric charged-AdS black hole (BH) solutions, including the charged AdS BH
surrounded by quintessence dark energy and charged AdS BH in $f(R)$ gravity in
\emph{extended phase-space}. This framework involves treating the cosmological
constant as thermodynamic variable (for example: thermodynamic pressure and
thermodynamic volume). Then they should behave as an analog of Van der Waal
(VdW) like systems. In the extended phase space we have calculated the
\emph{entropy product} and \emph{thermodynamic volume product} of all horizons.
The mass (or enthalpy) independent nature of the said product signals they are
\emph{universal} quantities. %Various type of phase diagram of the specific
heat has been drawn. The divergence of the specific heat indicates that the
second order phase transition occurs under certain condition. In the
appendix-A, we have studied the thermodynamic volume products for axisymmetric
spacetime and it is shown to be \emph{not universal} in nature. Finally, in
appendix-B, we have studied the $P-V$ criticality of Cauchy horizon for
charged-AdS BH and found to be an universal relation of critical values between
two horizons as $P_{c}^{-} = P_{c}^{+}$, $v_{c}^{-}=v_{c}^{+}$, $T_{c}^{-} =
-T_{c}^{+}$, $\rho_{c}^{-} = -\rho_{c}^{+}$. The symbols are defined in the
main work.
