Looks like my A4000 setup. Except mine is
not yellowed and has a rev.D mobo with a
CR-2032 Li-Mn clock battery with holder.
Also it has a battery clip on the back of
the case for holding 2 AA battery's,
in case the CR-2032 on the mobo gets empty
and I don't wan't to open the case.
The seller should immediatly remove that
red battery, they're always leaking accid.
:-D