Battery dead after sitting start/stop to blame?

[axleartillery163]

Just got back from a two-week vaca, and my 2020 JL's batt was totally dead! I'm scratching my head, wondering if that start/stop thing is the culprit. Swapping in a fresh batt now. Has this happened to anyone else? And is there a way to kill that start/stop feature for good?

 

[w1ldr00t]

Just got back from a two-week vaca, and my 2020 JL's batt was totally dead! I'm scratching my head, wondering if that start/stop thing is the culprit. Swapping in a fresh batt now. Has this happened to anyone else? And is there a way to kill that start/stop feature for good?

yeah, before you write off the battery entirely, did you fully charge both batteries? Sometimes the main battery is fine, but the aux one just needs a really deep charge.
If the dealer finds the aux battery is bad, insist on replacing both, they're often linked

 

[Elixir]

Yeah, sitting two weeks can drain the battery, especially with start/stop systems. Many use a tuner or bypass plug to disable it. I'd check for parasitic draw too...could be more than just start/stop.