Hi Reuben,
having a battery doesn't mean a thing in regards
to preamps, it means
it has an active rather than a passive pickup
But isn't the difference between an active and a passive pickup, that
the active one uses the electrical energy to run a preamp (or an EQ as well)
--> "Active" as in "active signal modifying" ?
But you're right when you said that the preamp of an active pickup isn't
the same than an
external preamp that amplifies up to a line-level for the mixer.
Best regards,
Sebastian