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I ordered RWS on my GTS. Does that mean I get a lithium battery or is that a different box that needs to be checked?
I do not want any Porsche lithium battery. That had issues with them years ago and it looks like they still suck
There was a long thread on this topic, maybe 6 months ago. As I understand it, from the information presented at that time - If you ordered RWS, you will get LiPO4 battery. No substitutions. The justifications i heard were for two reasons: (1) Overall car weight reductions, to compensate for the added weight gain of the RWS mechanism; and (2) a rapid surge capability from the battery needed for the RWS mechanism. The RWS may still work with a normal battery, just not fully as designed.
The LiPO4 batteries have nearly 2.5 X times longer lifespan than normal batteries. My plan is (I have RWS) use it, enjoy it, and in 8-10 years (or possibly sooner), sell it. If the battery goes sooner, then replace it with a conventional battery and just live with a RWS that doesn’t fully meet the designed capabilities.
I don’t believe Porsche stipulated the LiPO4 battery without good, sound reasoning?
Last edited by CodyBigdog; 02-24-2022 at 01:08 PM.
I ordered RWS on my GTS. Does that mean I get a lithium battery or is that a different box that needs to be checked?
I do not want any Porsche lithium battery. That had issues with them years ago and it looks like they still suck
You'll be getting a lithium battery. I believe it has something to do with the little electric motors that run the RWS mechanism. Whatever their reasoning, all cars with RWS get a lithium battery.
If I get bored, I'll look for the thread I remember from when I was ordering the car I may or may not get something this year. Or you could try searching for it. The guy from Antigravity wrote up an explanation that I remember seemed good but the details have escaped me.
”The new lithium-ion battery will be available as of January 2010 for the 911 GT3, 911 GT 3 RS, and Boxster Spyder as an option delivered with the car, selling at a price in the German market of Euro 1,904 including 19 per cent value-added tax.
The primary reason for developing and introducing the new battery was its lower weight. In sports cars built consistently for superior driving dynamics such as the two versions of the 911 GT3 and the
Boxster Spyder, less weight naturally means even greater agility and driving dynamics.
On a conventional car battery only about 30 per cent of the total capacity is actually available for practical use due to the configuration of the system, while this restriction does not apply to the lithium-ion battery. On the contrary, through its characteristic structure – and, in particular, the independence of the chemical composition of the electrolytes from the charge status – a lithium-ion battery consistently offers almost 100 per cent of its capacity.
Delivery of power by the lithium-ion battery throughout its useful charge range is likewise significantly better, providing its full power, for example, when starting the engine almost independently of the current charge level.
After the engine has started, the new Porsche battery shows further benefits in the charge process, being able through its smaller internal resistance to take up more power than a conventional battery and thus re-charge more quickly.
Yet a further benefit is that a lithium-ion battery allows a significantly greater number of charging and discharging cycles, plus the two further advantages that the self-discharging effect is lower and the service life of the battery longer.“
I’ve read as much as 2.5X longer lifetime than conventional batteries.
Last edited by CodyBigdog; 02-24-2022 at 01:39 PM.
”The new lithium-ion battery will be available as of January 2010 for the 911 GT3, 911 GT 3 RS, and Boxster Spyder as an option delivered with the car, selling at a price in the German market of Euro 1,904 including 19 per cent value-added tax.
The primary reason for developing and introducing the new battery was its lower weight. In sports cars built consistently for superior driving dynamics such as the two versions of the 911 GT3 and the
Boxster Spyder, less weight naturally means even greater agility and driving dynamics.
On a conventional car battery only about 30 per cent of the total capacity is actually available for practical use due to the configuration of the system, while this restriction does not apply to the lithium-ion battery. On the contrary, through its characteristic structure – and, in particular, the independence of the chemical composition of the electrolytes from the charge status – a lithium-ion battery consistently offers almost 100 per cent of its capacity.
Delivery of power by the lithium-ion battery throughout its useful charge range is likewise significantly better, providing its full power, for example, when starting the engine almost independently of the current charge level.
After the engine has started, the new Porsche battery shows further benefits in the charge process, being able through its smaller internal resistance to take up more power than a conventional battery and thus re-charge more quickly.
Yet a further benefit is that a lithium-ion battery allows a significantly greater number of charging and discharging cycles, plus the two further advantages that the self-discharging effect is lower and the service life of the battery longer.“
I’ve read as much as 2.5X longer lifetime than conventional batteries.
Thanks for the detail, honestly not sure I see the true benefit and even with 2X the life a regular batter still had more value based on the cost. It was an option on my Speedster which has RWS …..sounds like a Porsche money grab.
The last car battery I bought was approximately $145 and lasted seven years.
I don't see any cost advantage in what would basically be a $2,000 lifetime battery.
What's with all these battery discharge issue with German cars? My BMW 7 Series and X5 had this challenge and I frequently had to trickle charge. My current Jeep Wrangler, on the other hand, has no battery charging issues even with low Covid miles. I am hoping my new 992 (no RWS) when it arrives, can keep the current momentum going.
My MY ‘21 992TTS (LiFe and RAS) had a problem in maintaining its battery charge, even after as little as 72 hours of not being driven. The cause turned out to be poor ground contact. Since the grounding condition was corrected, I have not had any further difficulty
Not saying some batteries fail don't fail spontaneously, both AGM and LiPo. I can say, my LiPo battery went 10 days in a detail shop with doors opening and closing, me on connect waking it up to check on it (lol), was never started once during this time and it fired right up. I often leave it for 5-10 days, no tender, and never have issue. All that said, my battery is not special but rather appears to not have any manuf defect or issue. As long as the warranty covers this, I would not hesitate to get a LiPo battery. I love knowing the weight savings, and am confident cost will come down by the time it is not covered by warranty, not to mention, I truly love the RWS.
Correct me if I'm wrong here, but in the RC hobbies world, LiPOs are ticking time-bombs are and handled carefully and stored carefully. What are the dangers of having one of these in our cars?
What's with all these battery discharge issue with German cars? My BMW 7 Series and X5 had this challenge and I frequently had to trickle charge. My current Jeep Wrangler, on the other hand, has no battery charging issues even with low Covid miles. I am hoping my new 992 (no RWS) when it arrives, can keep the current momentum going.
It's pretty simple - compared to a new 911 your Jeep Wrangler has essentially NO new technology. I have a 2021 Chevy Colorado - same situation. That thing can sit for literally months and it will fire right up - no battery maintainer needed.
Correct me if I'm wrong here, but in the RC hobbies world, LiPOs are ticking time-bombs are and handled carefully and stored carefully. What are the dangers of having one of these in our cars?
OK, you’re wrong if you are extrapolating what’s happening in the “RC hobbies world” to Porsche. . Thanks for playing.
These have been in Porsche’s since 2010…can you link to any “wide spread” “ticking time bomb” issues, or recalls?
What’s the danger of having gas in your car? Just sayin’ 🤔
Last edited by CodyBigdog; 02-24-2022 at 04:24 PM.
02-24-2022, 12:53 PM
