i AM LOOKING FOR MORE POWER FOR MY JB3, DOWN TO 3 BATTERIES FOUND AN AFTERMARKET PRODUCER SELLING REPLACEMENT BATTERIES FOR AROUND $60-$70 JUST WONDERING WHERE MONEY IS BEST SPENT ON THESE OR AN EXTERNAL PACK i AM LOOKING FOR SOMETHING FOOL PROOF NO VOLTAGE CONVERTERS, SAUDERING, ETC.. JUST PLUG AND GO. THANKS, SHAYNE