Well I finally gone in done it... I yanked out the factory batteries and replaced them with a set of WalMart Batteries. I was shocked I to find that the Group 27 batteries where only $89 bucks a piece and they are 850 CCA batteries. I was smart and brought my tools along and changed them right in the parking lots and wheeled the tired stock batteries in the store and collected my $18 bucks worth of core charge. I got to admit the charging voltage is a bit lower and the starter seems to spin much easier. But after getting nearly 10 years from the stock batteries it was time to retire them.