If you just put a battery in there, doesn't matter what you hook it to, it's not gonna do anything. You need active components, such as transistors, jfets, mosfet, opamps, etc, to get any use out of a battery. And even then, you need additional circuitry to allow it to boost the signal. Google "bass preamp circuit". You will find lots of schematics to use if you do want to make your bass active.
I fall asleep to Nightwish, Dragonforce, and Epica... and sometimes with my guitar still in my lap.