So I have an optima yellow top (not the new one I bought from you wayne)that I was having trouble getting to hold a charge and thought it was dead. So i put it in my work van and used it for several days and had no problem. Then my bro. got on my van and said it stunk really bad and about an hour later my eyes were watering from the sulphur smell and I realized it was the battery. It still works well but why does it stink soo bad.