Dead Battery JLU 2018

Has this happened to you?


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First Name
Allen
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Just replaced this battery at 22,000 miles and I’m at 24,000 now. I woke up 3 mornings in a row to a dead battery. I charged it up and went to get alternator tested and battery tested and all is great. What the heck is draining my battery? Start/stop service system
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wired

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you might want to specify which battery. My ESS battery died 6 months ago
 

WranglerMan

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I’m quite sure those that run the stock setup will come along shortly and give some invaluable insight but it could be the ESS battery which is under the main battery tucked behind the front fender…gotta love those Engineers.
 

Sarge50

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REplaced Main Battery at 4k miles, 8 months since purchase. Towed to dealer first week, no start. Said battery was good. Not so!!!!
 

carlhenry

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my ess battery is under the back seat and i think it is like 48 volts it can be seen under the jeep right in front of the rear axle on the drivers side
 

aldo98229

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I replaced both batteries at 18 months and 6,500 miles.
 

txj2go

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My 2018 had low miles but the ESS has never worked. Before my long trips this spring I replaced the main battery with a new AGM and disconnected the little battery.

Most people who have reported said they replaced both batteries at the same time. I think the little battery is more prone to failure than the main battery.
 

Mojito Mojo

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Mine hesitated yesterday morning but today it was too drained to start. My ESS hasn’t worked for sometime and I have a message about ESS is in battery protectin mode!
 
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