It's on page 169 of my owner's manual, but...Page 234 is a good place to start.
Let me guess... you looked up battery and gave up.
Your vehicle may be equipped with a secondary
battery used to power the Stop/Start system
and the 12 Volt vehicle electrical system.
That says "MAY BE EQUIPPED". It does not tell me if my exact Wrangler has an auxiliary battery or not.