#1
first off, is it active? second of all, i was told you have to replace batteries in active pickups. is this true? are they expensive? how often must they be replaced? are seymour duncan jb and '59 pickups active also?
Gear
Guitar - Schecter C-1 Classic
Amp - Crate FXT65
Pedals - Dunlop Crybaby Wah, Digitech RP350

On Backup
Guitar - Baja Mini Strat
Amp - Baja 10W
#2
none of those are actives.

the batteries used for actives are no different from any 9V battery. If you consider that expensive then... I guess it's expensive to replace? You really don't have to replace them that often. They last a good while.