I re-placed the 2 Mopar batteries (big one is 700 CCA, little one is 200 CCA) with an Everstart H7/Group 94 battery. The new battery is 850CCA and comes with a 4 year warranty. Best of all, The battery system in my truck works like all the cars and trucks I have had for the last 50 years.
https://www.jeepgladiatorforum.com/forum/threads/battery-second-battery-and-jump-starting.74138/

