I agree with Rooster on Interstate batteries. They have served me good, but now I have Deka. That is all I could find locally, so the jury is still out on them. They cost a lot less then the previous Interstate. I have had them about a year now, and it seems like they are pretty good batteries so far.
Ray and June brings up a very good point. The reason I tend to agree with his theory, is because when I was looking for chassis engine batteries, I went to Napa and they had sealed batteries called Heavy Duty Napa batteries. I asked who made them and they said Johnson made the batteries and just installed the label to who was buying them. So ray and June might have a very good point.