Autozone sells Optima so if you ever bought it there, you could simply walk into over 3,200 stores in the U.S. or Mexico and ask for a new battery if yours was bad and they'd give you a new one.
I hate Optimas anyway, the design allows them to sulfate very quickly if left discharged even overnight and not recharged. I told the rep from JCI that, (JCI makes the Optimas, as well as Autozone's battery, Sears, Interstate, etc., all the same battery) and he told me that it's simply the nature of the design because there is no free acid inside. I personally think that's crap, and they need to understand that an off road vehicle is going to have sometimes very serious deep discharges on the batteries and that we need something that can not only take the deep discharging, but take a re-charge and still have enough CCA to start our trucks.
You asked what I run in my truck though. I've got two 900 CCA group size 34 dual terminal batteries. I typically only hook one up, but number two is always there if I need it.
My suggestion to everyone is that no matter what battery you choose, make sure you get a group size 78, (side terminal) 34, (top post) or a dual terminal battery in the same size, which is sometimes referred to as a 78DT, but typically is called a 34DT group size.
A group size 75 battery does not belong in our trucks, it's too small.
