Is the alternator in your Jeep putting out good current but your battery keeps dying? Does your Wrangler have two batteries? Don’t see another battery in the engine compartment? Well this 2018 Wrangler has two batteries and unless both are in good condition, the bad auxiliary battery will pull current and drain from the good primary battery.
Unfortunately, Jeep tucked away and hid the secondary auxiliary battery.

If you have an electronic start stop Wrangler, also known as an ESS system, the secondary battery is hidden under the fuse box that’s connected in parallel with your primary battery. This auxiliary battery provides electrical current for your car when the engine shuts off at a stop light to save gas.
If this secondary mini battery no longer holds a charge, it will quickly draw current from the primary battery and cause it to drain down and die.

The only solution is to replace this mini battery and this video will show you how I did it.

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Parts & Tools:

ACDelco Gold AUX14-200 36 Month Warranty Auxiliary AGM 200 CCA Battery
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Milwaukee 2456-21 M12 Cordless 1/4" Lithium-Ion Ratchet Kit
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