We went to Virginia this weekend and almost got stuck about half-way up at a gas station. The van did a bunch of clicking before the starter engaged when I turned the key. When we got to my in-law's, I popped the hood and the positive battery cable end was so corroded with acid, you couldn't really even SEE the cable end. It looked like coral was growing all over it. I touched it and it almost literally disintegrated in my hand. Woah!
Advance or Napa did not have a stock-style cable end for this thing. The cables terminate with about 3/4" of the insulation stripped off, then crimped down on a 90-degree elbow thing that bolts to a marine-type top post terminal connector. It's fairly straight-forward, but nobody sells those 90-degree bends to which you can crimp a cable, and I found out that the cables (there are actually two physical cables that join together at the terminal) weren't long enough to use a standard terminal end...they were too short because they were designed to crimp into that 90-degree bend -- and not to wrap up over the top of the battery into a standard terminal.
The two positive cables are 6-ga cables, so I ended up getting a top post terminal with a connected length of 1-ga cable. I stripped the end of that cable and used a super-large cable butt connection and jammed the two positive cables into one end and this 1-ga cable into the other. It worked all weekend, but the van will be going to Chrysler this week for a new battery and a new positive battery cable (though I doubt they'll do much more than what I did, because one of the positive cable leads is hard-tied into the main harness).
Why a new battery? Because the cause of the corrosion is apparently a HOLE in the top of the OE battery. There's a very small hole right near the positive post. I can't tell if it's simply a flaw in the battery, or if it was fatigued, etc.
Anyway, make a regular check of those battery cables!