I will look at the cables. My Schumacher SC1281 charger is also a desulfator. I just put in a new battery which has only a 45% charge at 12.3V so am charging it as I write this. Once charged I may have to disconnect the neg cable and reconnect to reset things. We'll see. If it doesn't work I just wasted $200 on a new battery. Murphy's Law/Luck o' the Irish.