In Feb of 2018 I bought a 2003 RAM 2500 that was built in January of '03. 86K original miles. It had a little hesitation but cranked up fine. The batteries were made in Dec of '02, they were the original Damiler Chrysler batteries, and upon close inspection they were the Delco/Delphi batteries with the "green eye" on the top but it was covered up by the Damiler Chrysler labels.
These batteries had lasted 15 years, which shocked me. I have in the past used the Delco/Delphi batteries due to their long life and got as much as 9 years from one, but the quality on the newer ones wasn't as good and I gave up chasing down a dealer to buy a battery that didn't last.
I wanted AGM and shopped price, Pep Boys had a 25% off sale on the Bosch AGM's so that is what I got.
As already noted, nowdays batteries work till they don't. You get about one or two strange startups that leave you going "what happened" and then they are toast.
Traveling, your best bet is to have a small lithium jump start pack and when they croak, if you are away from home, jump it and head for the nearest auto parts store and buy two new batteries.
Charles