  We analytically study the time-averaged electromagnetic energy stored inside
scatterers containing inclusions of arbitrary shapes. Assuming the low density
of inclusions, we derive the expression for the energy-transport velocity
through disordered media without relying on the radiative transfer equation.
Moreover, this expression is independent of the shape of scatterers. In
addition, we obtain a relation between the dwell and absorption times
associated with inclusions by considering the relationship between internal
energy and absorption cross-section. An approximation for the electromagnetic
energy stored inside a disordered medium in terms of the transport mean free
path and the packing fraction is also derived. This expression suggests that
the enhanced electromagnetic energy within the host medium is achieved for
inclusions exhibiting negative scattering asymmetry parameters. As a result,
disordered media with enhanced backscattering is expected to exhibit large
quality factors.
