Is there anyway I can add an extra 9 volt battery to my Spector NS200/Q5? There is already one in there though. Would I need to make room cause i found a spot where I can put it. Do I need other wires? Your probably wondering why I would add another one on, but I just read that if you add on another it'll make the signal or output stronger. Is this true? If you have information on this help me out on this.