battery charger

[Jebiruph]

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.

Unless you are disconnecting the batteries and charging them separately, does the precision of the charger for ideal charging matter?

Sponsored

 

[Nokones]

Is this charger ok?

No, it is not a smart charger and appropriate for charging AGM batteries. You will more than likely damage an AGM battery. AGM batteries require a specific charging rate and algorithm.

 

[GinaC]

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

Yeah, I just ordered one myself. I bought a Battery Tender 5 amp but I will be returning it.

I had no idea about any of this and I used to maintain my '06 Wrangler with a Battery Tender through the cigarette lighter. I did feel that I had to buy a new battery far too often. (Though 18 years is still a long time to keep a daily driver.)

The other plus is that the Noco cigarette lighter plug attachment looks far more well made than the Battery Tender one I had. Once I dropped the BT one and it broke apart.

 

[AndySpill]

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.

Ok..but better IMO, and on the whole for the battery/ies, to be maintained closer to its/their full state of charge through such methods than the occasional driver forgoing parking based methods of charging all together based on their desire to not make such under the hood connections...

 

[Mguy]

Unless you are disconnecting the batteries and charging them separately, does the precision of the charger for ideal charging matter?

Yes, if you have a really good charger. Probably no difference using a consumer 10 amp model, even those with an AGM setting.

 

[Flip]

No, it is not a smart charger and appropriate for charging AGM batteries. You will more than likely damage an AGM battery. AGM batteries require a specific charging rate and algorithm.

Thank you.
I'm going to order a new one.

 

[Rhinebeck01]

All this battery talk .... What battery/tender maintainer to get, etc.. What about metering..

For those that want a really small footprint, portable, easy to read and an inexpensive way to monitor your batteries.. Read here: https://www.jlwranglerforums.com/fo...ry-replacement-talk-jl-jt.100534/post-2218222

Click to enlarge

 

[BRuby]

Unless you are disconnecting the batteries and charging them separately, does the precision of the charger for ideal charging matter?

We have been charging each Jeep battery separately since new and each 2018 OEM is still fine. Our aux actually is stronger vs the main. All our batteries last 12- 14+ years before replacing when smart charged and desulphated. So see no need to vary at all what we do - especially when reports on this forum talk about replacing batteries after a couple of years. Sometimes even sooner.

Is odd that our Subie is not on a charger and is parked outdoors 24/7 with a 2017 OEM. So goes to show you do not need to be on a smart charger depending on the battery and vehicle. Here are a few quick pics of the chargers we have running at home at the moment. The 7200 was the predecessor to the current upgraded 10. We have 3# 7200 - 1# 10 - 1# 5 and 2# CTEK which were top of the line smart chargers way back 20+ years ago. The early CTEK did the job but the current NOCO tech profiles are significantly better.

Always smart charge using AGM mode for the Jeep. Do not use your old school chargers. We have one and have not used it in 20+ years. Of course as you know we are probs the only one on this forum that separates batteries because it works perfect for us. But each to their own. Do what you want and works best for you. This has all been researched and debated to death on this forum.

 

[Wabujitsu]

Walmart has these, and a cheaper Schumacher, on sale right now. https://www.walmart.com/ip/Schumach...-Box/854833173?classType=REGULAR&from=/search

 

[Jebiruph]

Yes, if you have a really good charger. Probably no difference using a consumer 10 amp model, even those with an AGM setting.

I'm interested (seriously) in how a charger can simultaneously precisely charge a 200 CCA and a 800 CCA battery, do you have any info or a specific charger in mind?

 

[Jebiruph]

Always smart charge using AGM mode for the Jeep. Do not use your old school chargers. We have one and have not used it in 20+ years. Of course as you know we are probs the only one on this forum that separates batteries because it works perfect for us. But each to their own. Do what you want and works best for you. This has all been researched and debated to death on this forum.

Ok, but my question was a response to @THAW regarding how the charger is connected to the battery impacting charging precision, not about old school chargers. The implication of my question is that charging both batteries at the same time has more affect on charging precision then long cables.

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.

Unless you are disconnecting the batteries and charging them separately, does the precision of the charger for ideal charging matter?

I just added some 6' SAE cables to my JL and JT to facilitate charging the batteries without opening the hood. While I agree with @THAW 's long cable comment in theory, I was looking for specific information related the impact longer cables have on battery charging. Not only did I not find any information related to cable length, I found NOCO sells 10' extensions to their cables with no mention of the extension affecting charging.

 

[Jebiruph]

Yes, if you have a really good charger. Probably no difference using a consumer 10 amp model, even those with an AGM setting.

I'm interested (seriously) in how a charger can simultaneously precisely charge a 200 CCA and a 800 CCA battery, do you have any info or a specific charger in mind?

I did my own research and the best information I found was Grok.com 's response to "charging agm batteries properly". Very good information.

From all my research I've concluded that a battery charger only sees the characteristics of the combined batteries and knows nothing about the individual batteries. Since the ideal agm charging rate is .1C to .2C, for the 12Ah aux battery that would be 1.2A to 2.4A. For connected batteries, if I connect a 10A charger to the main battery, I wonder what the charging rate is to the aux battery. Whatever it is, it's probably not as bad for the aux battery as this 15V charging that I see occasionally.

 

[wazzabie]

I did my own research and the best information I found was Grok.com 's response to "charging agm batteries properly". Very good information.

From all my research I've concluded that a battery charger only sees the characteristics of the combined batteries and knows nothing about the individual batteries. Since the ideal agm charging rate is .1C to .2C, for the 12Ah aux battery that would be 1.2A to 2.4A. For connected batteries, if I connect a 10A charger to the main battery, I wonder what the charging rate is to the aux battery. Whatever it is, it's probably not as bad for the aux battery as this 15V charging that I see occasionally.

What year is your Jeep? I wish I had the two small manual gauges on the dash. I just have the large screen.

 

[BRuby]

I did my own research and the best information I found was Grok.com 's response to "charging agm batteries properly". Very good information.

From all my research I've concluded that a battery charger only sees the characteristics of the combined batteries and knows nothing about the individual batteries. Since the ideal agm charging rate is .1C to .2C, for the 12Ah aux battery that would be 1.2A to 2.4A. For connected batteries, if I connect a 10A charger to the main battery, I wonder what the charging rate is to the aux battery. Whatever it is, it's probably not as bad for the aux battery as this 15V charging that I see occasionally.

We almost always find that doing our own research and testing is best.

It is almost impossible for a smart charger to know if you have 1 or 2 batteries hooked up. So that is precisely why we always separate batteries when charging. Zero guessing what the charge rate is to the aux. As noted - this was discussed with you years ago and the reasons for us doing so. Going 100% against the grain and what almost everyone else does on this forum.

But based on our anecdotal usage and extended battery life for all our batteries. We see zero reason to vary anything we do. But to each their own. Keep them hooked up in parallel and charge them together. Is better than not smart charging them at all. It is so simple to disconnect and separate - we always do that automatically now. Habit. Haha! Works perfect! All our batteries last almost forever!

 

[Jebiruph]

What year is your Jeep? I wish I had the two small manual gauges on the dash. I just have the large screen.

2018, that's the base dash that comes standard on the sport.

Sponsored