  We present a study of the lithium abundances of a sample of evolved
components of Chromospherically Active Binary Systems. We show that a
significant part of them have lithium excesses, independently of their mass and
evolutionary stage. Therefore, it can be concluded that Li abundance does not
depend on age for giant components of CABS. These overabundances appear to be
closely related to the stellar rotation, and we interpret them as a consequence
of the transfer of angular momentum from the orbit to the rotation as the stars
evolve in and off the Main Sequence, in a similar way as it happens in the
dwarf components of the same systems and in the Tidally Locked Binaries
belonging to the Hyades and M67.
