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Jumping your Jeep..... who has done it with a battery pack?

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Dkretden

Dkretden

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Folks,

can we stay on topic for a bit...... which battery pack models have you successfully jumped a JL with and, since it may be important, which JL was it..... 3.6 or 2.0 BSG.

folks, there are a ton of very helpful threads already on the way a JL is wired......I can read those. We can all read those...... I really want tips for jumper packs that work in real life.....
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Blu bi Kong

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I am aware that ONE poster— @Blu bi Kong —- here has used a JNC 660 battery pack to jump his Jeep. Has anyone else been successful using a battery pack to jump his/her Jeep and, if so, which brand/model jumper pack?
For what I'm getting out of the lightweight and relatively small pack, this thing gets my
 

jeepdabest

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To build upon @Rploaded's response Dino, the answer to this question is likely to be determined by which JL you have (e.g. 3.6L or 2.0L) and how you hook up the jumper cables.

Take the 3.6L. The owner's manual calls for you to sit with energized jumper cables for a while on the main battery's posts. This is for the purposes, more than anything else, of charging the ESS/Aux battery, which is connected in parallel to the main battery when the 3.6's at rest. Yes, you are charging the main battery too here, but it's really that ESS/Aux battery that much have a threshold of power or the 3.6L won't even attempt the crank.

Yes--that crank is powered by both batteries, (If available--see below) but it won't even be attempted if the ESS/Aux battery, tested in isolation first by the 3.6L, shows as lacking a certain threshold of power. Funny enough, with both batteries topped off you could crank and run your 3.6L on the ESS battery alone, but not the main battery alone. It's a long story as to why, and I can link video demonstrating this if you wish.

It's funny how you mention how long to wait. I debated here (with our resident expert @Jebiruph) hooking up a power pack to the positive post of the main battery, and the temporarily disconnected cables normally connected to the main battery's negative post, all while jumpering, with a fuse, terminals N1 and N2 in the Power Distribution Center.

https://www.jlwranglerforums.com/fo...-any-jumpstart-tips.12316/page-11#post-986785

That's a mouthful if your not already acquainted with this stuff. The idea was to hook up in parallel to only the ESS battery and immediately crank, not wasting precious jumper pack power on charging a main battery that once the rig is cranked, the alternator will charge.
Rahneld?
 

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roaniecowpony

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roaniecowpony

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I have in the last week been accused of being people I don’t know, even now when I reference my own posts!

Ladies: if you want to call me Fabio I’m all ears.
I'm hunting a guy named Sancho that I think was sneaking out my back door. Is that you? I just wanna talk.
 

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jeepdabest

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I have in the last week been accused of being people I don’t know, even now when I reference my own posts!

Ladies: if you want to call me Fabio I’m all ears.
UH HUH
 

Jebiruph

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There isn't a definitive answer as to which ones work and which ones don't as each situation is different. The better battery packs will have a higher success rate. Figure out what your comfortable spending, then buy the next level up. :)
 

roaniecowpony

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One thing to think about is the Costco Cobra H2O jump pack has Costco's lifetime no questions guarantee.
 

Gee-pah

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...as each situation is different.
...to state another way: the extent to which your JL's battery[ies] are charged, even if unable to crank the engine, can vary even if you could keep the power pack's power constant between tests.

At least on the 3.6L JL, Jerry and I discuss here how one might, with Jerry's fused jumpering of the N1 and N2 high amp fuses in the Power Distribution Center hack, connect a power pack directly to the ESS/Aux battery to increase the chances that a pack will get the 3.6L to crank.

https://www.jlwranglerforums.com/fo...-any-jumpstart-tips.12316/page-11#post-986785
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