I know they are bulky but thats what will be used , Got a question on wiring, Hoping to wire in series? To get twice the play time . How should I wire it ? Just take the two batteries and wire the same wires together on the same pcb ? Like wire the wires together the way they are on the pcb or do I need to do postive to positive , neg to positive then neg to neg on the pcb, Is that series or parrellel I always get the two confused.