Not reading all 22 pages! But, just last week I went out to start my Ram HO Cummins. Nothing! Put a tester on and checked both batteries and both showed bad. I just changed them last Sept. Put AutoZone supposedly top of the line for about $250 each. Couldn't find my receipt so I called AutoZone. Luckily they said I have a rewards account and they looked up the purchase. Manager wasn't too happy when I brought them in, but gave me two new ones.
The issue to me is not really the price, but the cheap junk you get. I have a Yellowtop that powers the accessories in a Mercedes I have. Even that battery that cost me something like $300 didn't last. Luckily again, the warranty covered. They charge a fortune for the batteries because they know they will be giving away free ones since they don't last.