Hey everyone. Hopefully this hasn't been asked to death. If it has, I apologize. I have a Schecter California Custom 4 and 5 string bass (photos below). I love the basses and how they sound but I have a weird fear of the battery dying on a gig and being left without anything. Usually, I carry a passive bass with me just in case but its getting kind of old carrying two basses. Yeah, i'm overly cautious. I'd like to upgrade their electronics with a preamp that has a true bypass so, if the battery does die, I can still play it. Also, I'd like to add a mid control without drilling another hole. I'd like to keep the pickups in them but am willing to change them out if the price is right. Specs say that the 4 string has an "EMG Active J/J Combo with BTS active EQ" and the 5 string has an "EMG 40P5 and EMG 40J" Any thoughts or suggestions?