2018 Pacifica Touring L + S
A little more detail might help us help you. As this thread is for the Stop/Start system, are you referring to the auxiliary battery? What year is your vehicle and how many miles on it.This battery is what runs this system but mines not covered why is that
If you can enter your vehicle details into your forum signature, it can help us help you in the future. ie Year, gas/hybrid, trim level, options, build date.