Tender or Batt disconnect

[word302]

Thanks for the clarification. That said, would you guess a vehicle battery kept on a trickle charger when at rest would last longer than one without a trickle charger?

Oh absolutely. Definitely better than nothing.

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[oceanblue2019]

I am going on a trip without the JL. Just wanted to get opinions if I should leave it alone, disconnect the batt or put a tender on it. I will be gone 3 -4 weeks. Its the 3.6l ess jlus if that matters.

I leave mine for 3 to 4 weeks all the time and do nothing special. It always starts and no issues. 2.0L with eTorque.

I would not worry about it.

 

[Gee-pah]

I leave mine for 3 to 4 weeks all the time and do nothing special. It always starts and no issues. 2.0L with eTorque.

I would not worry about it.

John: I have to wonder if owners of the 2.0 and 3.6 JL's might expect different results keeping their rigs parked for weeks without trickle charging--all else equal. (I just don't know.)

I being in the latter category (3.6L), like I suspect most, have as my second battery this thing that is almost comparable in size to some of the batteries I've had in search lights of years gone by--latern batteries I think they're called.

 

[oceanblue2019]

John: I have to wonder if owners of the 2.0 and 3.6 JL's might expect different results keeping their rigs parked for weeks without trickle charging--all else equal. (I just don't know.)

I being in the latter category (3.6L), like I suspect most, have as my second battery this thing that is almost comparable in size to some of the batteries I've had in search lights of years gone by--latern batteries I think they're called.

Could be, but it's purpose is for ESS so it must have at least capacity to cover whatever parasitic losses over 3 to 4 weeks?

I wonder if a 2.0L non BSG has the same ESS battery as the 3.6L?

 

[nerubi]

The battery that caused that fire was likely lithium ion. If you've never seen a video of thermal runaway on one of those batteries look it up. There's a reason they ask you if you have any of them in your luggage before they will check it into the cargo hold off an airplane. Scary stuff. That being said leaving a charger on a lead acid battery (at least one that is designed to be left on long term) is a fairly safe practice.

I unplug all my devices with litium ion batteries when I leave or go to sleep. I also unplug the tender the same way just to be extra safe.

 

[timn1984]

Sorry to revive an old thread, but I have a question: I am going to place a battery tender on my JLUS 2018 3.6, and was wondering where should I route the tender wires out to the outside of the Jeep in an unobtrusive area (so I can just attach the tender when needed), and what are the best places to connect on the battery itself. I read on this thread that one goes to the RED (Hot) and the other goes on a body bolt behind battery casing. Is this the correct setup and if someone could provide a picture I would really appreciate it.
thanks in advance.

 

[OldGuyNewJeep]

Sorry to revive an old thread, but I have a question: I am going to place a battery tender on my JLUS 2018 3.6, and was wondering where should I route the tender wires out to the outside of the Jeep in an unobtrusive area (so I can just attach the tender when needed), and what are the best places to connect on the battery itself. I read on this thread that one goes to the RED (Hot) and the other goes on a body bolt behind battery casing. Is this the correct setup and if someone could provide a picture I would really appreciate it.
thanks in advance.

https://www.jlwranglerforums.com/forum/threads/onboard-battery-charger.23188/

You can get eyelet connectors and attach directly to positive and negative battery posts. Every brand tender includes or sells them.

 

[timn1984]

@timn1984

Buy a set of quick disconnects. Attach the quick disconnect to numbers 4 and 7 as shown in the picture below. Hook up like this and your battery tender / maintainer will do the deed for both the Main and Aux battery.

As for the disconnect cable... IF you buy the quick disconnect and a 2" short extension (eBAY) for the disconnect, you can actually drop the charge cable down and behind the fender liner.

Protect the cable with some plastic shielding and the capped end of it, you just lay in the frame rail hole til you need it..

When you want to charge, just lean into the wheel well, grab the cable end and plug into your battery maintainer...

No need to open the hood of the Jeep.

Thank you, Rhinebeck01 , that was extremely helpful. I almost private messaged you but thought I would put this out there for everyone in case someone else had the same question.

 

[Rhinebeck01]

Sorry to revive an old thread, but I have a question: I am going to place a battery tender on my JLUS 2018 3.6, and was wondering where should I route the tender wires out to the outside of the Jeep in an unobtrusive area (so I can just attach the tender when needed), and what are the best places to connect on the battery itself. I read on this thread that one goes to the RED (Hot) and the other goes on a body bolt behind battery casing. Is this the correct setup and if someone could provide a picture I would really appreciate it.
thanks in advance.

@timn1984

By the way.... IF, you do hook up the battery maintainer / tender as mentioned earlier, as stated it will do the deed for both the Main and Aux battery at the same time...

You will want to use a small amp output tender maintainer since the little Aux battery in the mix, is only 200CCA and will have trouble / could be damaged if you use a high amp output tender..

So, with that said it is probably best to stick with say a 1.25 amp tender and for sure no more then a 5 amp tender that is designed to work with AGM batteries.

 

[timn1984]

https://www.jlwranglerforums.com/forum/threads/onboard-battery-charger.23188/

You can get eyelet connectors and attach directly to positive and negative battery posts. Every brand tender includes or sells them.

Thanks Oldguynewjeep, I love y our name by the way. My tender came with eyelet connectors, just wanted to be sure how to connect them.

 

[Rhinebeck01]

@timn1984

With the maintainer / tender hooked up.... and the hood down, it is real easy to forget that the maintainer / tender is hooked up. You will inadvertently, drive off with it hooked up.

The cable will just pull loose / disconnect but you do risk / are at risk of damaging the cable...

So, consider doing as I do... Hang one of these near the steering wheel ... in plain view whenever you attach the tender/maintainer cable... It will become second nature to do this ... to place the tag and will save you from an oh chitt, moment.

https://www.amazon.com/gp/product/B0035CXLLK/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

 

[timn1984]

@timn1984

By the way.... IF, you do hook up the battery maintainer / tender as mentioned earlier, as stated it will do the deed for both the Main and Aux battery at the same time...

You will want to use a small amp output tender maintainer since the little Aux battery in the mix, is only 200CCA and will have trouble / could be damaged if you use a high amp output tender..

So, with that said it is probably best to stick with say a 1.25 amp tender and for sure no more then a 5 amp tender that is designed to work with AGM batteries.

I have a Battery Tender Plus, 1.25 amp, thanks for the heads up.

 

[timn1984]

@timn1984

With the maintainer / tender hooked up.... and the hood down, it is real easy to forget that the maintainer / tender is hooked up. You will inadvertently, drive off with it hooked up.

The cable will just pull loose / disconnect but you do risk / are at risk of damaging the cable...

So, consider doing as I do... Hang one of these near the steering wheel ... in plain view whenever you attach the tender/maintainer cable... It will become second nature to do this ... to place the tag and will save you from an oh chitt, moment.

https://www.amazon.com/gp/product/B0035CXLLK/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Sounds like a voice of experience!

 

[Gee-pah]

Sorry to revive an old thread, but I have a question: I am going to place a battery tender on my JLUS 2018 3.6, and was wondering where should I route the tender wires out to the outside of the Jeep in an unobtrusive area (so I can just attach the tender when needed), and what are the best places to connect on the battery itself. I read on this thread that one goes to the RED (Hot) and the other goes on a body bolt behind battery casing. Is this the correct setup and if someone could provide a picture I would really appreciate it.
thanks in advance.

Tim, it sounds like you've gotten the answer you need, which from suitable answers afterwards suggests that your original question was, "how do I bring a tender, say, not under my hood, but more than likely stored most of the time in my garage/house, and most easily connect it the vehicle without having to pop the hood or have tools with me to do so."

And that's certainly a plausible way to do things especially if that charger may have application across more than one vehicle.

I keep my trickle charger under the hood, so for me, cable access was more about how to conveniently run A/C shore power to the plug attached to the charger, not the permanently connected DC side for which you desire convenience of hooksup.

There's good content here on that too if you want references. There's even 3 prong A/C plug products sold that often find their way into emergency service vehicles that automatically "spit out" the shore plug when the engine is crank so you can charge the vehicle when not in service, but you don't "drag the firehouse to the call" via the electric cable.

I do also have similar setup to that desired of you with Anderson type plugs appearing outside the front of the vehicle between the bumper and radiator so as to facilitate energizing 12 volt appliances, jump starting others, or being jump started.

Links available upon request.

 

[timn1984]

Well I did the big stupid yesterday and had my Battery Tender hooked up to the Jeep all night and got in it early in the morning and drove off, without unplugging...... I first heard a slight clunk, but me of course didn't think anything of it, thought it may have been a small branch under my tire. When I got back home, I noticed the extension cord attached to my outside plug, but no battery tender. Looked all over the road and did not find it. Had to order another one. Big dummy......

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