I am currently working on an EUB project. Right now I am working on planning all of the electronics. I am going to start of trying to use Pick-up-the-worlds solid body preamp. This pre-amp requires a 9v battery. Forgive me if this is a stupid question, but I do not know a lot about electronics. Is there a way that I could wire in a small led to indicate the battery strength? I thought of this the other day. I was using a boss foot pedal and thought that the battery indicator light that is integrated into it would be cool to integrate into my bass so that the battery doesn't give out in the middle of a gig. Is it as simple as just wiring the LED inline with the power and as it gets dimmer the battery is lower? Any idea's on the best way to accomplish this?