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post #11 of 28 (permalink) Old 01-09-2017, 09:08 PM Thread Starter
teo
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If no charger can help when the battery is accidentely drained, then I think a good booster pack is the best to have. I thought normal wall charger or old school charger would charge drained battery regardless of the voltage. Good to know...

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post #12 of 28 (permalink) Old 01-10-2017, 12:47 PM
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If no charger can help when the battery is accidentely drained, then I think a good booster pack is the best to have. I thought normal wall charger or old school charger would charge drained battery regardless of the voltage. Good to know...

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^This. I bought one from harbor freight, and that one was pretty reliable specially during the winter season for my little evo 8.
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post #13 of 28 (permalink) Old 01-10-2017, 01:02 PM
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If no charger can help when the battery is accidentely drained, then I think a good booster pack is the best to have. I thought normal wall charger or old school charger would charge drained battery regardless of the voltage. Good to know...
Keep in mind that booster packs likely have protective circuitry as well ; I'm not sure they'll send current to a dead battery. And if you go the booster route, try and get the old school ones that are more bulky, not the tiny Li-Ion ones we see everywhere nowadays... The little ones are Ok for *light jump starting* duty, but the heavier ones just have more juice and more reserve capacity...

In battery language, there is *drained*, and then there is drained... Anything below 10.5V is considered drained. 2V or less I would say completely drained, or dead. And let's not forget a lot of smart chargers have voltage auto detect, so if your 12V battery is drained below 6.6V, the charger will see it alright, but may see it as a 6V battery... which is why charging a completely drained battery requires a little knowledge.

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post #14 of 28 (permalink) Old 01-11-2017, 06:30 AM Thread Starter
teo
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Has anyone tried using an Agm deep cycle battery to jump start v6 cherokee? Maybe I should get one instead of battery backs as it might be handy when I go for camping. It might have a dual purpose. Thanks.

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post #15 of 28 (permalink) Old 01-11-2017, 10:12 AM
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Has anyone tried using an Agm deep cycle battery to jump start v6 cherokee? Maybe I should get one instead of battery backs as it might be handy when I go for camping. It might have a dual purpose. Thanks.
Teo...

... you need to study-up on batteries. Your TH already has an AGM battery if you have the V6 and ESS. AGM batteries do both starting and deep cycle applications, they tolerate cold weather and last longer than wet batteries.
The bulky booster packs contain AGM batteries. Smaller than our big KL AGMs, of course, but they need to be transportable so they can't stick 50lbs worth of battery in there...
Oh and an AGM battery similar to the one in the KLs will run you $350 or more, in Canada so if you want a backup deep cycle battery for camping, you may find that a decent wet deep cycle battery would do the job for half the price... And if you need power when camping, you might be better served by a small and quiet Inverter gas generator because a battery system requires a lot of care and maintenance.
But hey it's your money.

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post #16 of 28 (permalink) Old 01-11-2017, 11:50 AM
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I wish my drained battery problem was this simple. For the last week I've had to jump start the Kl twice. This last time I jumped started it took about a half an hour to start.


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post #17 of 28 (permalink) Old 01-11-2017, 12:15 PM
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I wish my drained battery problem was this simple. For the last week I've had to jump start the Kl twice. This last time I jumped started it took about a half an hour to start.


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Yikes! Sorry to hear this--has this been addressed at all on the dealership level for you?

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post #18 of 28 (permalink) Old 01-11-2017, 12:26 PM
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Yikes! Sorry to hear this--has this been addressed at all on the dealership level for you?



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I'm currently at the dealership. They still haven't told me anything.


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post #19 of 28 (permalink) Old 01-11-2017, 12:45 PM
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I'm currently at the dealership. They still haven't told me anything.


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Keep me posted, let me know if you need any help.

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post #20 of 28 (permalink) Old 01-11-2017, 12:54 PM
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I wish my drained battery problem was this simple. For the last week I've had to jump start the Kl twice. This last time I jumped started it took about a half an hour to start.
Did a quick check via your profile and I found out you have a 2015, so unless you drive way too much (haha) you're still on the basic warranty. Which is good. What I didn't find was whether you have the V6 or I4. If V6, you have the AGM battery, which in therory should last much longer than this, unless it's been drained frequently, etc... I also notice you are in Nevada, so more exposed to heat than most of us, and batteries don't like very hot weather, even AGMs. We've had members in Arizona report dead KL batteries in less than 2 years because of the heat...
Anyway, they should fix you up under warranty.

Good luck..
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