i know man, i was just giving you a hard time. just in case pete missed it. now days theres not much difference in the cheap batteries and the top dollar. we see it here all day long. what kills batteries for the most part is spent plate material lodging between plate and shorting a section of plate, thus reducing the batteries ability to generate cca's. the only way to increase cca on a 31 series battery is to jamb more plates into the carcass. this increases the ability of plates to short out and reduces the usable life of the battery. my suggestion in a 2 battery situation is to reduce the individual cca per battery. you'll still have plenty of power on hand, but the internal shorting of plates will be reduced. of course all of this is irrelevant if you step up and by optimas or equivilent.
daryl