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Does anybody know if this work around will work on a 992 GT3? Unfortunately I was led to this thread because my 992 GT3 has this same lithium battery problem. It's even worse since the Frunk can't be unlocked with a dead battery, you have to jumper it through the fuse box. Everything is a pain in the butt with this battery. The car is just over three years old and within the warranty period but they wont warranty the battery unless the car has been driven 6k miles/year. I've always kept it on a battery tender though.
Does anybody know if this work around will work on a 992 GT3? Unfortunately I was led to this thread because my 992 GT3 has this same lithium battery problem. It's even worse since the Frunk can't be unlocked with a dead battery, you have to jumper it through the fuse box. Everything is a pain in the butt with this battery. The car is just over three years old and within the warranty period but they wont warranty the battery unless the car has been driven 6k miles/year. I've always kept it on a battery tender though.
Hey Subshooter, I wanted to point out that we make a solution for getting your Car Jump Started or your Frunk opened very easily. We sell a Harness for our MICRO-START Jump Staters that routes to the area of the Passenger side windsheild and frunk, and tucks under that area so you can't see it. So, in the event you have a dead battery you simply slide our MICRO-START Jump Starter onto the Harness and you can immediatley jump start or open the frunk to your Porsche in seconds since it powers your entire system. This eliminates and simplifies going into the fuse box and messing around with that connection which doesn't always work anyway. With our Harness you don't need the clamps and it takes literally a 2 seconds to plug in the jump starter to our harness and be ready to jump the car or open the frunk.
Also note our MICRO-STARTs can wake up the Porsche Lithium Battery out of its sleep mode it it not already damaged and can't wake up.
Lastly we have been looking for a few people to test out a swap for the 911s that have the Lithium Battery.... if you mechanically minded you can reach out to us, email is in the sig, and we can tell you what we are looking at.
Cayenne has battery under the floor in the inside, how should it work with this cable ?
I was responding to sub-shooter who has a GT3, not a Cayenne. It is not needed for a Cayenne because the you can access the battery if it goes dead. In a 911 you are locked out of the Frunk if your Battery goes dead, so your can't reach the battery.
Cayenne has battery under the floor in the inside, how should it work with this cable ?
@Woofman posted his connection to the jumper terminals under the hood. The Antigravity clampless harness would install in the same fashion.
I have them installed on my daughters’ vehicles for trouble-free jumping with their Micro-Starts. No reverse polarity issues in the dark.
Originally Posted by Woofman
. . . I had to attach the positive cable of the NOCO harness to the bolt with the plus mark on it due to space limitations Both the positive and negative "bolts" were barely more than hand tightened which seemed odd.
. . . Thanks but I find it preferable to plug the male 12V connector from the Charge-o-mat charger into the female 12V port on the NOCO harness instead of opening the red plastic cover each time and messing with alligator clamps. That way I don't have to worry about inadvertently getting the polarity wrong when I've had to many tequila shots. (Thirty-five years ago my so-called friends had a bar waitress bring a tray of one dozen tequila shots to me on my 29th birthday which, not knowing any better, I consumed posthaste. I don't remember the next 12 hours but unfortunately many other people did.)
Hey Subshooter, I wanted to point out that we make a solution for getting your Car Jump Started or your Frunk opened very easily. We sell a Harness for our MICRO-START Jump Staters that routes to the area of the Passenger side windsheild and frunk, and tucks under that area so you can't see it. So, in the event you have a dead battery you simply slide our MICRO-START Jump Starter onto the Harness and you can immediatley jump start or open the frunk to your Porsche in seconds since it powers your entire system. This eliminates and simplifies going into the fuse box and messing around with that connection which doesn't always work anyway. With our Harness you don't need the clamps and it takes literally a 2 seconds to plug in the jump starter to our harness and be ready to jump the car or open the frunk.
Also note our MICRO-STARTs can wake up the Porsche Lithium Battery out of its sleep mode it it not already damaged and can't wake up.
Lastly we have been looking for a few people to test out a swap for the 911s that have the Lithium Battery.... if you mechanically minded you can reach out to us, email is in the sig, and we can tell you what we are looking at.
Hey Scott. I have your microstarter and harness. They work great. But I also have a failed lithium battery in my 992 GT3 and Porsche refuses to warranty it because I have not driven it more than 6000 miles/year. It's only 3 1/3 years old and I have been using a CTEK lithium tender too.
I am nursing the battery until I decide what to do. Porsche wants to charge me $2300 for a new one. I also have a 992 GT3RS with that same battery so I'm looking for a solution to get rid of these defects.
I do all my own maintenance on my three Porsches and other cars. I will take you up on your offer and just emailed you. We have talked on the phone before.
Mark
Last edited by subshooter; Apr 16, 2025 at 09:22 AM.
Hey Scott. I have your microstarter and harness. They work great. But I also have a failed lithium battery in my 992 GT3 and Porsche refuses to warranty it because I have not driven it more than 6000 miles/year. It's only 3 1/3 years old and I have been using a CTEK lithium tender too.
I am nursing the battery until I decide what to do. Porsche wants to charge me $2300 for a new one. I also have a 992 GT3RS with that same battery so I'm looking for a solution to get rid of these defects.
I do all my own maintenance on my three Porsches and other cars. I will take you up on your offer and just emailed you. We have talked on the phone before.
Mark
Hi Mark, I will respond to your email.
For the others, sorry to intrude on your thread, I'll take to Subshooter directly after this post. But I just wanted to make sure Subshooter also was informed of a few things since this is a problem that will effect ALL the Porsche that have the Porsche brand (A123) Lithium battery.
Now for any of you in warranty, you can push back hard on Porsche because that is the biggest bunch of boloney about having to drive a Car 6000 miles, or they won't warranty the Battery. The fact is we are talking ELECTRONS flowing.... a battery does not care where those electrons come from be it a Charging system or a Charger, and it can't tell the difference at all. So for Porsche say you must drive to warranty a battery won't really hold up in any form because you can have a battery on a Tender and it will be maintained as well as the Cars system and even more uniformly to be honest.
So if you guy choose to push back on Porsche do it will vigor and say you'll take them to court... yes that seem ridiculous, but I did just that when they claimed our Antigraviy Lithium Battery caused an Emergency Brake Sensor to lock the Car (GT3RS) in place, they wanted me to pay $5000 to fix this and I called them out on it saying, NO CHANCE... fix the Car or I will in fact take you to court, but at that point I was VERY angry because they were acting like the battery caused the problem and outright lying to me.... they called back later and said they will fix it. So your warranty for batteries is under the Emmisions warranty, but if you push back HARD they should give in... you have a great argument if you say you maintained it with THEIR PORSCHE CTECK CHARGER ALL THE TIME, so fix it.
Now keep in mind it is best to drive your Car in general because it keeps engine and suspension seals lubed, and has other benefits for the Cars... but their claims of not driving a car and it damaging or eliminating a warranty on a battery are silly.
Hi did you find the coding for the new sensor (from new/old sensor on the negative cable) to the car?
Not sure if you're asking about my recent post. If so, no. My Supercar Expert replied to my email and said they couldn’t help me. Wife rarely drives her Cayenne so we’re going to wait until the next service. They should be able to re-code the TPMS with PIWIS.
Hello Chassis, I live in Paris (France), but the problems with 12-volt lithium-ion batteries are the same. At the beginning of May 2025, I want to buy my 2022 Cayenne coupé, which had been sitting idle for only 5 days: no more power in the car. It was, of course, the 12V battery that had shut down even though it was charging and therefore without any voltage drop. I received assistance from Porsche. They applied the new WSA4 patch you mentioned (Reprogramming of the battery sensor gateway control unit). According to them, it should finally eliminate all peripheral problems with lithium-ion batteries, including the unexpected disconnection problem I experienced. They also applied the new WSC7 patch, which concerns the management of the high-voltage battery (Reprogramming of the high-voltage power electronics and the PSM control unit).
I have been getting this warning for about 2 weeks - the voltage reading on the dash has been showing between 13.5-13.7 consistently.
We just returned from a 200 miles road trip - all went well.
Car works perfectly fine other than the annoying warning light.
1. What happens if I choose to ignore the warning and keep driving around like this?
2. If I convert to AGM battery, would I be able to use the terminals under the hood to jump the battery if it goes bad in the future?
I’m most curious on what would happen if I just continue to drive with the warning light - I’m monitoring the voltage readout as I drive around and noticed no change.
Hi, I went through the exact same thing (19 Cayenne T). It is possible, with a dealer visit, that they may be able to put a software patch in to get rid of the low voltage warning message. The error will not go away on it's own, as there is an internal circuit that needs reset or recalibrated within the battery itself. Since the battery is pretty old you have one of two choices:
1) Buy another lithium battery from Porsche ($1500 installed).
or
2) Convert to AGM (~$400, around the cost to have the dealer just check your current battery out and likely tell you it's no good). This entails getting a kit to convert the battery from Lithium to AGM and a H8 battery ($180 at Walmart). The kits are available online, just do a search (such as this one https://mysupercarexpert.com/product...Id_5gV2OE0b-Ni). The conversion is easy, the instructions are above. The kit comes with a dongle to reprogram your ECM to work with the AGM battery. Once you have converted, no more issues with jumping or using the wrong trickle charger. And future battery changes are simple. I used a PIWIS unit to do the conversion within the ECM. It's not a bad idea to have access to one, or similar, in case you get any odd errors (I got an error related to removing power). I changed to AGM and are not looking back.
(Thirty-five years ago my so-called friends had a bar waitress bring a tray of one dozen tequila shots to me on my 29th birthday which, not knowing any better, I consumed posthaste. I don't remember the next 12 hours but unfortunately many other people did.)
