Hi all,

This is a NOTICE for those owners of Porsche 992s that came equipped with the Porsche Factory Lithium-Ion Starter Battery in the model years, late 2018-2024. Please note: If you have an AGM Battery equipped in your 992, or a 2025 Hybrid 992 this does not apply to you.

The problem that has been identified is that some of the OEM Porsche Lithium Starter batteries that came in the 992s have had failure issues after being deeply over-discharged. For example, after a deep discharge the battery puts itself into a Sleep/Protection Mode to protect the battery from damage, but after entering this mode the batteries are unable to be awakened again, leaving the battery dead and unusable.

A key factor with the Porsche Lithium battery is that it is a proprietary design that integrates the LIN-Bus communication directly within the battery itself, so in effect this was the ONLY battery you can use if your 992 came equipped with it. This created other issues that were reported by 992 owners such as Porsche did not have stock on hand in the USA to quickly replace these batteries, that the cost was extremely high, and the owners did not want to use these batteries again since they are expensive and didn't last very long.

THE GOOD NEWS. THE ISSUE HAS BEEN SOLVED...
Antigravity Batteries can now happily report that we have developed a relatively easy to install solution that allows you to replace your Porsche Lithium Battery with either an AGM Battery or an Antigravity Lithium Battery. You are no longer tied to the proprietary Porsche battery for your 992. Though we have some kits currently available for those who are in immediate need, we are finalizing the product packaging, instruction manual and video of installation for our final product which we expect in a week or two.

In the meantime, in the upcoming days we can answer some questions, post some FAQs and get some pictures out. If anyone is actively working through this issue and wants to discuss technical details feel free Post,PM, or use email in our signature.

 

Thanks for the great work on this. My 2022 Lithium 992.1 is being maintained by your SC10 charger at the present time, but options later on are fantastic news.

 

Thats great new's and looking forward in hearing more on this!

 

This has been possible for some time - just install the OEM AGM negative battery lead that has the voltage sensor, and then you can use ANY battery that will fit. I'm messed around in PIWIS in programming different battery types, but honestly, i don't know if it effects anything.

 

Good info! Thanks bro!

 

Just a vouch for @Antigravity here. I put their 60AH lithium in my Emira and it's been fantastic. Saved a ton of weight over the OEM AGM, and though I've never had to use the built in emergency battery jumpstart feature, it's cool that it has it.

Their SC-10 10-Amp charger/maintainer has been great for all my cars as well. Definitely better than the 4/5-Amps!

And they've been super helpful here on the forums, giving a lot of education on how lithium batteries work and how their needs and readouts differ from AGM. Really like these guys!

 

Thats great you were able to do this yourself, we totally respect that .

What we are doing is making an all-in-one solution so the average 992 ower who doesn't want to try to source individual parts, or have to mess around with finding the correct battery setting, or connectors, or doesn't have or know how to use PIWIS to change settings can do this easily and on their own.

So if you don't mind, perhaps you can start your own thread to discuss what you did to acheive your solution and this thread can be dedicated for those 992 owners who just want an easy all-in-one solution such as Antigravity Batteries have developed. Thx.

 

I wanted to post up some FAQs to better explain the product. I will post up some pictures probably tomorrow, we are working on an installation video also... but it really is pretty easy to install, we just want everything as easy as possible to most anybody would feel comfortable doing this.

Does this kit void the 992's Warranty?
No, this kit is compromised of standard replacment parts and in fact a dealer cannot claim a standard part as a reason to void any warranty on a Car per the Federal law called the Magnusson Moss Act. With that being said Porsche Dealers will tell you what they want to try to make you feel as any aftermarket or non-Porsche installation will harm their car.

Will this harm my Porsche 992?
This kit does not harm your Car, it is putting your Car into the same state that the AGM equipped 992s come in. It adds a new Ground Cable and a new Linbus Wire, then uses an ODB2 Module to program your car's system settings for the new battery so no coding or coder is required on your part.

What Batteries should I use as a replacement for the Porsche Lithium Battery?
The Porsche 992s that were equipped with the Porsche Lithium Battery were using a 60Amp Hour Lithium Battery. We suggest that you replace that with the same Amp Hour battery if you are going with Lithium again. For example, the 60Amp Hour Antigravity RE-START Battery (with built-in wireless jump starting) in either the H6 or H7 size (both these batteries are the same on the interior, only the case size if different). But you can also use an AGM Battery, and in that case you would go with a quality brand in the H7 size (aka Group 94R) that is rated around 80-90 Amp Hours which varies by manufacturer

Is this Conversion reversible?
Yes, you would simply put back in the original parts, but please note: You would have to take the Car to an Independent Porsche Garage, or Porsche Dealer who has Porsche's “PIWIS” diagnostic computer which can put the battery settings back to their original settings for the Porsche Lithium Battery.

How EASY does “easy-to-install” really mean?
If you have some basic mechanical skills, such as in the past working on your car, replacing your own battery the process should be relatively straight forward. It only consist of 4 part that are all easy to install. It entails replacing removing the original battery from the 992, replacing the Negative ground Cable, installing a new Linbus wire into your existing Porsche Linbus Connector, then updating the system with a preprogrammed ODB2 Module we supply (which requires no mechanical ability). But also note... to make this kit as easy as possible to install everything in the kit is pre-labled with Tags on each component so you know exct where each part goes, and those tags correspond to our Installation Instructions which makes it quite simple to understand and install.

 

Isn't this the technical discussion area of the forum? If this is a thread about solutions for replacing the Porsche lithium battery, certainly f4bone's posts are relevant to the topic in this thread, so he should continue to post here. If, like you say, you offer a simpler solution than replacing one part with a different OEM Porsche part, then your solution can stand up to a discussion about alternatives in this, the discussion forum. Otherwise, the vendor announcements forum might be better suited for your desired goal, if it isn't discussion.

 

It's been discussed here MANY time - you simply replace the ground strap with PN 992 915 181 and then you can use any battery that will physically fit, including Antigravity batteries.

 

Hey derpington. I see you specifically wrote "If this is a thread about solutions for replacing the Porsche Lithium Battery....."

I'm sorry if I did not make it clear enough in my original post, but my post was NOT intended to be a general thread about "solutions" for replacing Lithium Batteries in the 992s. My post was specifically directed at those interested in a complete tested and developed kit made by Antigravity Batteries. We have recieved many calls on this issue at our office, and been in several threads discussing this exact issue on Rennlist, and no one was saying they had solved this or offered a solution to the general community as far as we saw. In fact, we even posted a thread looking for Testers regarding this issue many months back.... no takers from Rennlist unfortuantely. So, we finally came up with a kit and were excited to annouce that information and answer question our our product.

I'm sorry if that offended you, and you feel I was trying to limit discussion by F4 or others, but Antigravity Batteries spent the time in developing and testing a solution, no one was posting about a solution being done. So when I posted to F4 to create his own thread for the complete DIY'er, it was not something to become offended about, it was not to limit discussion, it simply because they are two different subjects as I see it. One thread should be for those looking for and easy premade kit where you can inquire of the manufacturer, and the other is for the complete do it yourselfer person who wants to take on the project, perhaps save money and they can post about what products they used, what worked and how they programmed the PIWIS system. I just didn't want one thread to have two conversations talking over each other. Hopefully you can see the difference.

 

Premium sponsor posts about their product they would like to sell. Others come offering other solutions and posters surprised OP whose advertising helps pay for the site would prefer to keep on topic.

Social media is a bizarre place.

 

If any thread were to stay on topic it would be the first and I'd eat my hat if it happens. Such is the nature of any forum I've been on. A more "controllable" approach might be to post the informative only thread as locked and invite people to contact our generous sponsor directly with questions. I know I will when my OEM lithium battery takes a dirt nap because easy and tested is worth my business even though the other approach is workable. YMMV.

 

Riiing riiiiiiiing

John: "Hello?"
Sales guy: "Good day Mr. John! We would like to offer you mobile subscription which will save you alot of money on yearly basis!"
John: "Ok? What kind of offer?"
John's wife: "But darling, you have a company phone with all costs allready covered"
Sales guy: "Excuse me lady, if you dont mind, we are not talking about his company phone here, lets keep on existing subject. Tnx."

 

No, I do not see the difference, and I do not see how discussion of different solutions to replace the Porsche OEM lithium battery with other batteries is incompatible with a thread entitled "NOTICE: 992 Porsche Lithium Battery Replacment [sic] Solution." If someone in the future were to search this, the technical discussion subforum, to try to determine what the solution for this problem would be, it would be significantly more convenient for those users to find a single thread that contained relevant information and answers, especially in a thread with a title that specifically purports to be just that.

Moreover, even if you did specifically title this thread as a product announcement, F4 would still be entirely justified in the technical discussion forum to discuss other technical solutions solutions or competing products because that is the entire point of this subforum.