Hi, I have a 2024 718 GT 4.0. Because of an injury I let her sit for two months.

Battery is dead, dead. I got the car open and attached the Porsche battery charger to the cigarette lighter port as instructed. Nothing.

I used the instructions to pop the frunk and put the charger on the positive terminal and the designated negative connection spot.

The first few times I got immediate clicking and some interior lights coming on. Now when I connect and select the charge mode I eventually get a red error light.

Some ideas I have and would like input

1. Connect to POS and NEG terminals of the battery
2. Disconnect the wiring and connect to POS and NEG directly
3. Use another brand of charger
4. Remove battery (somehow) and take to a battery shop for a tester
5. Replace battery (if I do that do I need some dealer involvement or will it just "work"

Thanks for any thoughts

 

Do you have a multimeter? I know one of my chargers won't initiate charging if the voltage is too low. And if the battery really is that low, it might truly be shot anyway. But for a 2024 car it seems odd it'd be dead dead after sitting for just two months.

1/2: It should be fine to connect directly to the battery, either way.
3: I wouldn't go out and buy another charger just for this
4: This would be the easiest way to answer your question. The battery is straightforward to remove, just heavy and a little awkward
5: Officially you're supposed to do some programming in PIWIS, but you can skip that. From what I've heard around here, without pairing the new battery might have a slightly shorter life is all.

 

Firstly, what type of charger/maintainer are you using?

IIRC a CTEK needs about 3A to detect the battery and begin a charge.

If you have a booster pack, I'd attache it to the battery and start the car however, ensure you use the bat+ve and correct -ve post. Allow the car to run and the alternator will provide some charge into the battery. Once there's enough in there, attache the charger/maintainer and let it run a charging cycle which, if you have a CTEK, will take roughly 8-12 hours.

Of course you do this at your own risk but as someone who has suffered pretty much what you're going through now a while ago, that's the what I did.

 

As some mentioned you battery might be bad. As a reference for the future, when lead/acid/AGM batteries get over-dischared it damages them. The deeper and longer they sit the more damage.

As another mentioned, most chargers will not begin charging if they see less than 3v, its a safety thing. If you can try to connect another battery to it for a few minutes to get the battery voltage a little higher then that can get the voltage high enough to get the charger to recognize it and begin charging it. The lead/Acid/AGM will accept a charge, but it might still be damaged anyway after you charge it, so it won't hold a charge well and you may get flags in the Car once the battery starts to go bad.

If you do need a new charger we make one that will do Lead/Acid/AGM and Lithium, and has a built in Power Supply that can get some energy back into your battery without using another battery, then you can switch over to charging after that. I would always suggest for modern car you use at least 8-10 Amp Chargers becaue they area faster, and provide overhead for todays modern Cars that can have more loads on the battery due to all the computer stuff and systems in modern Cars.
SC-10 Super Charger https://antigravitybatteries.com/pro...hargers/sc-10/

If you looking to eliminate this type of issue in the future we make a Lithium Battery with built-in WIRELESS Jump Starting that will go into a Protection Mode if over-discharged but save enough energy to start the car again up to 3 months later. It works whether you locked out of the frunk or not.... also has a much longer lifespan than lead acid, weighs about 35 lbs less, but is much more expensive. But those are some options.

 

Thanks for all the tips. I am using the Porsche charger/maintainer. I just connected a Norco 1 to see if that makes a difference but I believe I will replace it.

 

Thanks everyone for the help. I decided to replace the battery

 

Shouldn’t that still be covered under your bumper-to-bumper warranty?

My 981 was a 2016 under CPO in 2024 and they replaced my original factory battery under my CPO warranty

you should still be under factory warranty with it being a 2024