So long that I forgot which model detector I have. Its a 4500 not a 3500. has been in its bag for a long time now with no opportunities to detect for many years. I spent a couple of years looking after a homestead about 100k north of Coolgardie. Started with a 3000 and updated to a new 4500 in 2007. Found lots of gold but mostly small stuff the biggest about half ounce. Well I think its time to revisit WA. So planning a trip for next year but have forgotten how to set up the Minelab so have to relearn and practice first. The insulation on wiring from head phones has perished and ear padding falling apart, and battery not holding charge. Is there a better sound system than the original? I was thinking about replacing batteries in the power source, Is that the way to go or is there a better way.