Did you try shutting off the fan option in settings?

 

Try turning off the "AC Auto Drying Feature"

 

IF Hyundai is aware of the problem and considers 'auto dry' to be a valuable feature, all they have to do is install a battery with a larger AH capacity. This is an easy fix.

 

Rick2055, one of the automatic operations like the cooling fan or auto ventillate or auto dehumidify could be the problem all of us 2024 Konas are having with parasitic battery drain. I've found our fan running after we've left the car for some time. I've shut of all auto ventillate and dehumidify settings. Let's see what happens. Clearly not enough of us 2024 Kona owners have had dead batteries to get Hyundai USA or Hyundai corporate in Seoul's attention. Thanks TJ for the auto fan info!

 

Was at the dealer the other day for 5 hours. There happened to be a tech there from Hyundai who was training the mechanics. This is what he told me, and don't blast me for the info, I am just the messenger. He saw the mileage on my car which is very low 2k for 5 months. I told him I just retired, and I don't use the car much. He told me that there are many things that draw power from the battery even when the car is off, including the app, the sensors, the cameras etc. He said when I came in, my battery checked at 70%. It was a 40 miles drive to get there. He said he guarantees that my battery was probably 30-40 percent before I left the house. He said if you don't drive it, it will steadily lose juice to the point that it won't start. He told me it's not the battery, and they would have no problem putting a new one in, if that was the problem. He brought me over to the new car lot and showed me all the new cars that have battery tenders on them because Hyundai wants them charged up in case a customer wants to test drive one. He told me to get a battery tender and leave it on, so the battery will always be charged and ready to go. So I just picked one up for $40. Again, I am sure most here won't agree with this, but for me, it's the best solution for now. I'll give Hyundai a few months to see if this is something they recognize, and if not, I will trade it in.

 

What about people who don't have q garage

 

We had a 2020 Kona Limited for three years and NEVER had this problem. If Hyundai loaded the 2024 up with so many apps/sensors/cameras that drain the battery after they are turned off, why didn't they come up with a more powerful battery or charging system that made up for the inherent parasitic drain? Anyone know of any other Hyundai owners with 2024 models (other than Kona) who are having our problem? This is a model killer in my opinion. If Hyundai can't provide a Kona that doesn't go dead by itself, it's time for a new car, even though we only have 2200 miles on ours.

 

I have 2k on mine and I agree with you. At least with the tender, I can keep it charged until I decide what I want to do. If anyone is thinking of using a Tender, the Battery in the Kona is 12v AGM setting.

 

Good input. Then why do some of us have dead batteries? Never had this problem on any of my many cars before. 😕

 

We've got a 2024 Kona Limited FWD. We were away for 18 days. Got back, Kona started with no problem. If the dead battery problem was to happen, I guess that would have been the test. I hope it gets figured out. Gary

 

It's hit or miss. You can leave it alone for 3 weeks, and it will start up, or you can leave it alone for two days, and it won't start. That's why it is so hard to find the problem.

 

Add me to the list of people who are having this issue. My Kona was bought in January and I had my first experience with this problem today. I had noticed the fans coming on after the car was shut off before but thought it was a 'feature'. I'll be taking it to the dealer tomorrow and plan on giving the tech all the links to these threads about this problem. Not sure if they can do much about it, but at least they'll know where to start.

 

The Cabin fan coming on IS a feature called Auto Dry. If you don’t like it, read the manual. It’s a setting you can turn on or off. But… I have it ON on our 2024 Kona Limited and don’t have a battery issue.

 

Has anyone used a 12 volt battery tender plugged into the cigarette lighter in order to slow charge the battery

 

That’s not a cigarette lighter. It’s a 12v power port and IMSM, it’s only hot when the car is on accessories or running. So a switched power port will not work if you plug a tender in it.
my Dodge and Ford each have 2 ports. One switched and one non switched meaning the non switched is active all the time. Those are the ports I use for my tender. With the engine running, get a 12v test light or volt meter and check for power on your Hyundai port. Should have 12v.
now shut the car off and open the drivers door. If you lose 12v than the port is switched and a tender won’t work in that case. You’d have to go directly to the battery.
Hope this explains it.

 

As I was posting earlier this morning my Hyundai's battery was dying. Went to the garage to go shopping. Hit the starter button and nothing. There was enough juice left in the battery to illuminate the display. A message flashed on the display that said there was a parasitic outside source discharging the battery. Had to leave for about 45 minutes and by the time I got home the battery was toast. I checked the battery with my volt meter when it happened and you could actually see the voltage falling. I made a short film clip of it. Called roadside assistance. Triple A came out and jumped it and I let the car run for about 30 minutes and shut it off. Put my battery charger on the battery and it wont take a charge. Charged it for about four hours and it only shows a 25% charge. Never saw a battery discharge that fast without something running on the car. There was nothing running and like I said before you could actually see the voltage falling with a meter. What ever happened it may have killed the battery for good. Will know in a couple of hours. Put my other battery charger on it to see what happens. Probably be calling road side assistance again in the morning. Concerning the message that was on my display what could be an outside source on the car? Thought it was a self contained system. I have been watching the car like a hawk to try and catch something running on the car but was a little too late. I am completely baffled.

 

I’d bet the battery is an issue. Possible internal short. Hyundai uses AGM batteries in the Kona and god knows who makes them. These are not like the typical flooded lead acid batteries were used for years.
running the car for 30 minutes probably did little good. Kona uses a “smart” charging system designed to maintain charge rather than charge a dead or low battery. A good half hour run down the interstate will help to charge it. Not idle speed.

 

This sounds like it's above and beyond a dead battery issue. Hope Hyundai can get a handle on these problems. After bringing my car in last week (which I waited 3 weeks to get an appointment) I don't have a lot of faith in their ability to come up with a solution as they told me to get a battery tender.

 

I continue to deal with this issue. Drove car on 6/11 then parked car over night had no report of issues (i have third party battery monitor (bouncie)) next day drove car 50 ft. at 6am, 8 hrs later monitor reported batter at below 11.5 volts. I now have a battery tester that i purchased at NAPA it read cold battery at 11.2 volts i have run car for 15 minutes battery now test at 12.4 volts i will check it in the morning to see how much it has dropped overnight.

 

Dealers won't do anything until Corporate acknowledges there is a problem. My dealer told me it was normal because I don't drive my car a lot, BULL!!!. I have owned 20 cars in my lifetime and never had an issue with battery dying because I might not drive the car for three days. They told me to buy a battery tender, that was their solution. I am wondering if the new CCN3 system Hyundai is starting to roll out in all their cars is the issue, I also Wonder if other models beside the Kona are having issues.

 

How did you learn corporate is aware of the issue

 

How did you learn corporate is aware of the issue

How did you learn corporate is aware of the issue

I am not saying they know, even though common sense would dictate between the dozens of people online that have reported this problem and the untold amount that don't report online, they do. Every trip to the dealer for service gets reported to corporate.

 

Well count me in on the dead battery group...I came out this morning to find my '24 N Line which i purchase 1.5 months ago battery was dead....I made sure to keep all the doors locked and also had the AC Drying Feature turned off....

 

Update: I got into my Kona using the mechanical key and jumped started it...I then drove it over to my local Hyundai dealership where they determined the battery was shot and immediately replaced it with a new one....I was there for less than an hour total...I spoke to the Service Manager about this problem and even sent them links to a few threads here on the forum showing how widespread the problem seems to be! They are documenting this and sending a report over to the engineers at Hyundai for further investigation...

 

Well, that puts the lock door with key fob and keep keys in shielded box theory down the drain. I keep mine on a battery tender, and I think it's the only way to avoid a dead battery as of now. I think a new Subaru Forrester is in my future if Hyundai doesn't man up to the problem.

 

Do a little research on Subaru dead battery issues. My daughter is in on the class action suit for a battery issue on her 2021 that started 2 years ago. Subaru keeps the car and says they can’t find a thing. They put a new battery in and it was okay for 10 months. Now same old same old.
She’s starting to regret trading her 93,000 2015 Ford Fusion which gave her no trouble. Being an ASE certified tech myself and in the auto repair business for 58 years, you better believe I’d hear from her immediately if she has a problem.
I’m wondering if Hyundai didn’t just get a bad batch of batteries.
We’ve had no issues with our 2024 Kona Limited and we do have AC drying turned on on both of our profiles.

 

Thank you I will, I am looking at the 2025 Forrester (new redesign) so maybe I'll get lucky. People have reported getting a Battery replacement from Hyundai and still going dead, so I don't know if it's the battery, I tend to think not. My dealer tested mine for 2 hours, on a new machine Hyundai just sent them, and it was fine. He told me if the Battery was bad, he would have no problem giving me a new one, but it's not.

 

Just happened to my 2024 Kona for the first time. Battery is totally dead. NOT a good thing. Hyundai better fix this issue and soon or they are going to get sue!!!

 

My Stealership, as well as many other Stealerships here in the US, like to install LoJack antitheft GPS devices in all their new cars and then add it as a markup item...

I recently purchased a '24 Kona N-Line that had one of these installed and I refused to purchase the Kona with this "Dealer installed" option....They disabled it and after inspection this morning I found that it was still hardwired in the system...It was not connected, nor piggy backed onto the OBDII line port but instead still had 12vdc power and control line tapped into existing lines...

Recently after one month of ownership and only 850 miles my battery died and had to have it replaced by dealer under warranty...Wondering if this LoJack which has been disabled but still hardwired into the system could be a problem?

I also have come on occasion to find the climate fans running even with the AC dry out feature disabled, door locked with fob, and fob stored in a faraday box...

I have an appointment with Service next week for another "we owe" item and will ask that they physically remove this LoJack device that's still hardwired in the system....

Stay Tuned....

 

Was not aware of need to use fob. I used the door button all the time. 5 months in and battery completely flat. So many fault a in this car. Should have stuck with VW troc

 

At least you got 5 months, I got two months and Battery died.

 

After the last episode where I lost all camera function on the car it went back to the dealership exactly one week ago today. Do I know what is happening with the car? No I do not. One week and not a call or text from the dealership with an update. Sort of expected it because I went through the same thing last visit. Hyundai USA rep called me yesterday when I was out. Was in a no signal zone when she called. Didn't see her voice mail until much later. Called her back and left a voicemail. Did not get a call back. Becoming more stressful by the day. Have another car in the household so I have not been stranded. No offer of a loaner from the dealer. Not really happy with Hyundai. There doesn't seem to be any communication between the dealers and Hyundai. Now with the cyberhack going on with the car dealers I am not sure if I will ever get a car back.

 

Cross posting from:

https://www.hyundaikonaforum.com/threads/poll-battery-drain-issues-not-associated-with-obd-dongles.9687/unread

and

https://www.hyundaikonaforum.com/threads/ghost-battery-drain.9657/unread

Here's the actual Hyundai battery diagnosis procedure TSB.
If every dealer is not performing this diagnosis when presented with a battery issue. they are doing it wrong.
Kona owners should never be presented with a dead battery without Bluelink first sending a notification that there is a problem so the car can be started, instead of waiting for roadside assistance to boost the car.
Dealers should not be telling owners of a brand new car to get a battery tender or to drive the car more to avoid a dead battery.
Hyundai needs to fix the OBDII port in the Kona so it works the same as millions of other cars when an external device it attached to it.
https://static.nhtsa.gov/odi/tsbs/2023/MC-10243340-0001.pdf

 

I'm having the same issue, have a 2024, the vehicle has been to the dealership 3 times, the battery has been replaced. I don't think that they know what the issue is. Over the past couple of months I've done my own troubleshooting - turned off the AC running while off, it still died, I put the key fob in an RFID blocking pouch, the battery still died. I uninstalled the digital key and didn't have any issues, so this past weekend I decided to reinstall the digital key, I really like this feature, and sure enough the vehicle was dead Monday morning. I'm running Android Samsung Galaxy S24 Ultra. I'm almost positive that it's the digital key after all of my troubleshooting, I just don't know how to fix it. I carry a portable jumper to be on the safe side. I uninstalled the digital key again and am going to see how the vehicle performs this week.

 

I was reading a couple of months ago about people suggesting uninstalling the digital key, so I did, I don't use it anyway. Since then, I have not had a dead battery. I don't know if the two are related, but crossing my fingers, since the only thing my dealer told me is to carry a charger and battery tender with me.