In spite of what the experts on social media will tell you, the auxiliary battery exists to isolate and protect your Jeep's computer during start up. Auto start stop amplifies the amount of start ups your Jeep sees and turning that off will help reduce it but it won't change the fact that your computer will still get shocked if you remove the auxiliary battery. This is not an opinion and it comes straight from the engineers at Jeep.I totally got rid of that demon aux battery. Connected the + to the positive terminal! On main battery, and left - terminal alone.
Went and got a champion H7 battery and have had no issues in 4 months...