battery charger

[Flip]

A modern 10 amp charger designed for AGM batteries made by a reputable company like NOCO or CTEK is not going to harm your battery. If, for a rough example with some approximations, an 80 amp hour AGM battery is at 50% depth of discharge, a 10 amp charger may take 6 hours for the battery to reach full charge, while a 1 amp charger may take 60 hours.

I think I better check my battery charger here shortly. I believe it's fairly old. As mentioned; steel, heavy, it could be used as a small boat anchor.

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[Rhinebeck01]

According to the Battery Tender website the 1.25 amp charger works with AGM batteries. https://www.batterytender.com/blogs/battery-tender-blog/best-agm-battery-chargers

@wazzabie

Yes, it is aok for use with AGM batteries..

Don't think I am saying the Battery Tender Plus 1.25 offering is not a really decent battery tender/maintainer as it is. Read my way back/past posts on the forum and you will see I often talked of using a Battery Tender Plus on my 2018 JL.

I have been using the Deltran Battery Tender Plus, model, since Deltran started offering that model in 1991. Actually I was in Deland, Florida, in 1991.. at Deltran's offices.... and bought mine right from the guy (Mike, Sr.) that started Deltran. I even got him to give me a free Deltran t-shirt.. 8-) Mike Sr. died a few years back and his Son took his place. He's an aok guy and he has given me a few T's and some other swag over the years.

As mentioned earlier, it's just myself and other's on this forum, found out through months/years of use that a 1.25 battery tender maintainer just did not do the job well enough, in regard to the JL.

I went from 1.25 amp output to a Noco 5 and even found the 5 amp output was not doing the deed well. Other's here found the same thing out.

So, now I use a Noco 10 for charging the Main, charging the Aux or charging both the Main and Aux when they are connected in parallel as a stock dual battery system, JL is.

Sure there way better maintainer chargers out there but they are pricier then the Noco 10 which I opted to go with, partly because of how much a Noco 10 costs..

Oh... I use a Battery Tender Plus 1.25 amp on my Harley FatBoy 01.
.

 

[AndySpill]

@wazzabie

"I encourage you to research about the JL and it's dual battery system and about 12v vehicle batteries."

I do not...unless of course you want to learn more about a system, just for curiosity sake that you don't have.

Your first post mentioned an eTorque model. That gives you, as you point out initially, one 12V AGM battery not dual AGM batteries as found in many other JL Models.

...Do I think a higher amperage charger than that you suggested might be wise: I do. But unlike in the dual AGM implementations you won't be charging two AGM 12V batteries.

 

[AndySpill]

I'm going with purple.

There is positively (no reverse pun intended) nothing wrong with attaching your charger negative to where I circled in purple.

I simply submit there are other no less Stellantis acceptable places for at least a low amperage trickle charger's ground to connect to if those places source the body ground circled in orgon their negative/ground side.

 

[THAW]

I'm ok if it takes along time to charge using a 1.25 amp charger. My understanding is that the lower amp chargers are better for the battery because the higher amp chargers are more prone to causing damage. A 10amp would be faster but would it be just as safe as the 1.25 amp slow charge?

Most AGM battery manufacturers recommend a 0.1C to 0.2C charge rate; put simply, that's 10-20% of battery capacity. For the factory main battery in most JLs that equates to 7 to 15 Amps, so a 10 Amp charger is well-suited to the task.

Using exclusively a low-current charger can cause chemical damage to the battery (i.e. shorten it's life).

 

[Flip]

Most AGM battery manufacturers recommend a 0.1C to 0.2C charge rate; put simply, that's 10-20% of battery capacity. For the factory main battery in most JLs that equates to 7 to 15 Amps, so a 10 Amp charger is well-suited to the task.

Using exclusively a low-current charger can cause chemical damage to the battery (i.e. shorten it's life).

Is this charger ok?

 

[THAW]

Is this charger ok?

Amp rating looks good. But overall it looks pretty old-school, so it probably lacks modern optimization for AGM batteries?

 

[Flip]

Amp rating looks good. But overall it looks pretty old-school, so it probably lacks modern optimization for AGM batteries?

Thank you.

Yep, I'm reasonably certain it's 20 years old or real close to it. If I were to use it, should I use the 10 amp setting?

 

[Flip]

Amp rating looks good. But overall it looks pretty old-school, so it probably lacks modern optimization for AGM batteries?

After reading and consideration, I believe its time for new AGM charger. I didn't realize how old my junk is.

 

[Terrymo]

After reading and consideration, I believe its time for new AGM charger. I didn't realize how old my junk is.

Good to have you back on the forum brother. Things got way too serious without you here.

 

[Flip]

Good to have you back on the forum brother. Things got way too serious without you here.

Thank you, it's good to be back. It's great seeing everyone.

 

[2nd 392]

Thank you, it's good to be back. It's great seeing .

,

 

[THAW]

I simply submit there are other no less Stellantis acceptable places for at least a low amperage trickle charger's ground to connect to if those places source the body ground circled in orgon their negative/ground side.

Irrespective of the IBS, it's sub-optimal to charge through long runs of small gauge wire and/or through body ground paths, since the charger may be unable to precisely assess/regulate voltage at the battery as required for ideal AGM charging.

 

[wazzabie]

Ok I'll get the Noco genuis 10 amp. thank you for the help.

 

[YBABRAT]

IMO the battery positive connection being on battery is a nono when charging or testing. Old school wsy back when ignition was off it did not matter. Today's cars have electronics still operational in sleep mode. Even when ignition is off, current drain is happening. The amount of current drain can effect how a smart charger or smart tester will see an AGM properly as for charge state. Trickle charging may not matter so, by how it pulses or toggles charge states to maintain battery.

Rule of thumb... long term storage, disconnect positive battery post and trickle charge. Over a week or two of away time, a goid quality trickle charger while positive cable is still connected.

Ground is odd on Wranglers. Due to body on frame, isolated pocket areas of frame are battery ground dead spots. One reason why I added extra grounds from body to frame for my winch install.

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