Hey everyone , I am new to this site and , I wanted to ask Your opinion on Optima blue top batteries . I came across a really good deal Today , in fact , it was a freebie . I was asking our battery Rep. Today about what kind of batteries He carried on His truck and , He was showing Me some of their better ones and , We got to talking about Optimas , anyway , He told Me that He took a couple in for warranty and , one of them was still good He thought ......... Well , one is good so , He gave it to me . I figure I scored big but , I got to thinking about it and , wasnt sure if it would be good to use or not . I recently bought one of the 8000 lb . Smittybilt winches and , I am about to do the GM alt. swap . So , thats the question , I really dont see much difference in the Yellow top and the blue top . Thanks in advance .