I wanted to chime in here as I have on other thread topics so related. I have a fair amount of experience on this topic after 45 plus years monkeying around with 12 volt systems in my myriad of Jeeps to date.
With that said, due to the nature and build sequence of Optima batteries, no matter where they are constructed are and have been, top flight and top notch in every way. They are manufactured in several countries because so many foreign military use them in their own vehicles. Optimas rock, period!!
With that stated, however, there are other better options. If you have large APUs (NASA Speak for Auxiliary Power Units as on the Shuttle) on your Jeep: welders, air pumps, winches, lighting, stereos, etc, you need to just go to the biggest, baddest electrical system as possible and have it over with.
Thus, get rid of all automotive wiring-appliances and go with industrial grade items for same.
Thus, go with Caterpillar (CAT) or John Deere batteries at 650 amps each and above. 1000amp is better. And go with 2 batteries, not one. And go with welding cable to wire your Jeep, not little 6 gauge auto wiring. And then go to a JD or CAT alternator of at least 100amps or more. That is a wrap, then.
Hope that is helpful.
Robert