Replacement Battery Questions

[OlderGuy1stGenesis]

I would like to hear from someone knowledgeable about the electrical charging system on the Genesis.

Fact: Automotive battery designs are changing a lot. Current example: going from flooded lead acid batteries introduced in the last century to agm and glass matt and gel batteries. Most of us know that modern solid state chargers have different settings which determine the beginning and finishing voltages during charging and those voltage differences are there for a reason, namely that the new compositions of plates/battery/insulator electrolyte ARE DIFFERENT than earlier designs.

It is one thing to use charging pattern xxx in 2005, and then changing from the original charging pattern in say 2016, TO A DIFFERENT ONE.

In short, we don't want to either shorten the life of the battery by overcharging it or having it under perform by undercharging it so that it never gets to full charge.

I have the 2014 3.8 Genesis sedan. Are the new AGM glass mat or gel batteries suitable AS DROP IN REPLACEMENTS ? I am not interested in opinions. Every one has an opinion and 1/2 of the time they are wrong.

I would like to hear from Hyundai, or someone who has worked in an automotive electrical shop, or with a battery manufacturer, or has experience with this.

 

[Gunkk]

OlderGuy, I'm not sure if we have resident experts with the credentials you require... but we can read this:

https://batteryuniversity.com/learn/article/lead_based_batteries

and then this:

Absorbent Glass Mat (AGM) Battery Information - Battery University


...and then we can come to the question IMO we should focus on:

Does the Genesis charging system have a temp limiter and voltage control to prevent overcharging and/or dry-out of an AGM?

I don't know, but I don't think so. So I continue to use flooded cell and spend my $$$ elsewhere.

 

[carguy75]

I would like to hear from someone knowledgeable about the electrical charging system on the Genesis.

Fact: Automotive battery designs are changing a lot. Current example: going from flooded lead acid batteries introduced in the last century to agm and glass matt and gel batteries. Most of us know that modern solid state chargers have different settings which determine the beginning and finishing voltages during charging and those voltage differences are there for a reason, namely that the new compositions of plates/battery/insulator electrolyte ARE DIFFERENT than earlier designs.

It is one thing to use charging pattern xxx in 2005, and then changing from the original charging pattern in say 2016, TO A DIFFERENT ONE.

In short, we don't want to either shorten the life of the battery by overcharging it or having it under perform by undercharging it so that it never gets to full charge.

I have the 2014 3.8 Genesis sedan. Are the new AGM glass mat or gel batteries suitable AS DROP IN REPLACEMENTS ? I am not interested in opinions. Every one has an opinion and 1/2 of the time they are wrong.

I would like to hear from Hyundai, or someone who has worked in an automotive electrical shop, or with a battery manufacturer, or has experience with this.

This is a forum.

Most of the answers here will be based on opinion or speculative information obtained from the web and regurgitated to this forum. However, this is only my opinion.

Your best bet is to just research how car batteries work(AGM, lead acid,etc) and look up information on Hyundai specific changing systems related to your model so you can make an educated choice.

 

[pulsar]

Stick to simple. Go to Sams or Costco and get the same group battery as OEM that has a 3 year full return warranty and be done with it. Your car will start the same regardless of exotic battery type or basic flooded wet cell. There is little evidence the expensive batteries actually last longer even though the manufactures try to convince you otherwise. You can pay $99 or $199 and in the same 3 or 4 year time frame the battery will be tired and needing replacement regardless of type.

 

[OlderGuy1stGenesis]

OlderGuy, I'm not sure if we have resident experts with the credentials you require... but we can read this:

https://batteryuniversity.com/learn/article/lead_based_batteries

and then this:

Absorbent Glass Mat (AGM) Battery Information - Battery University


...and then we can come to the question IMO we should focus on:

Does the Genesis charging system have a temp limiter and voltage control to prevent overcharging and/or dry-out of an AGM?

I don't know, but I don't think so. So I continue to use flooded cell and spend my $$$ elsewhere.

=================================================================
I have been a battery hobbyist most of my life watching the brush armature/commutator generator morph into a reverse winding generator armature/commutator with smooth slip rings and modern solid state diodes. Now the car computer can also have its electronic say so.

(My hobby is submarine batteries) Both older auto alternators and present ones compensate for temperature, modern ones measuring the temperature of the alternator case near the windings. This is good. Some of the newest chargers seem to like a four stage final charge where literally the voltage varies SLIGHTLY in all four stages. ELECTRONIC WIZARDRY !

In the sixties the major differences between American alternators and Japanese ones was this: American auto standard: about 13.8 volts, Japanese standard about 14.3 volts. Both systems worked well with lead acid batteries.

In reading your links and other stuff, it seems like the voltage generally stays within the 14.4 volt standard with these exceptions. Due to cold weather temperature compensation, some or many cars start ramping the voltage up as temperatures start falling below 40 degrees. What is the temperature at 6:00 AM in New York state ? One chart I read had charging voltage as high as 14. 7 or even 14. 8. at 40 degrees winter temperature. For lead acid batteries, NO PROBLEM. The battery will stay charged. For others, ECHHHHH (Will this hurt the AGM battery ? We don't know. )

So my rough guess is I do not think AGM's will especially suffer in Florida, but without experts kicking in, I could see a potential problem in the north. On the other hand, driving from North Carolina to New York, in November, how likely will the battery get ''hot'' ? Now, if anyone wants to supply me with some free batteries for the next 10 years I would be glad to report back with my experience traveling between South Carolina and Montreal, Canada.

 

[QuantumRift]

Stick to simple. Go to Sams or Costco and get the same group battery as OEM that has a 3 year full return warranty and be done with it. Your car will start the same regardless of exotic battery type or basic flooded wet cell. There is little evidence the expensive batteries actually last longer even though the manufactures try to convince you otherwise. You can pay $99 or $199 and in the same 3 or 4 year time frame the battery will be tired and needing replacement regardless of type.

I have to agree with you 100%. I like the KISS principal. Over the years I tried the expensive batteries in everything from my 1990 Isuzu Pickup (which I still own) to my 650 motorcycle. I DO have an AGM battery in it, because they are good and last a long time. But I eventually learned, with help from Consumer Reports, is to get the battery that has highest CCA, and the longest replacement warranty, with the best price. GO with the best warranty. And I stick with the flooded lead-acid as well, cause here in OH, I need the extra weight in the back end in the winter....

 

[shahhere]

I've posted a deal from Pepboys that is on sale through today 12/2/2019 with 35% (up from 25% average) and a $50 rebate (up from $40 average) and combined with Cashback can be had for about $80.xx which is really good for the 48 month AGM battery.

Genesis 3.8 2012 battery on sale at PepBoys - ($106.24 AR +Tax) Champion AGM Battery Champion AGM Battery

Shahhere