Original batteries still in my 02 Cummins . . . don't drive it over the winter, so it sits with the battery tender on the batteries to keep them charged. Also, I check the electrolyte level and top up with distilled water when needed . . . they still check out ok using external battery load checker!!

I have been using the premium Walmart Ever-start batteries in all of my cars including my 05 Ram for years without fail. They are sealed very well around the terminals, so no corrosion. I use a lot of Napa batteries at work, and for a while they were terrible for post corrosion. They seem better now however.