This is from personal experience.First off we did the same thing as aj .About a month before we headed north the guys I bought my cart from replaced one of my batteries to buy me some time.We're going to have to replace the pack when we return in the fall.Second I was under the assumption my batteries were warrantied for the same amount of time as the rest of my cart.Well I was wrong. The batteries go by amp hours or usage.So unless EZ G O is the only one doing this don't count on the 4 year warranty.JMHO!