Porsche Motorsports lightweight battery

[vansicklenmi]

Does anyone know if one of the new Porsche Motorsports lightweight battery will work in an early G body 911?

[Hi_Fi_Guy]

I don't know but Odyssey makes some terrific batteries that weigh much less than the originals. I use them in my Cayman and long nose 911 as well as other vintage cars. Compact and plenty of power.

[Eric at Pelican Parts]

Antigravity batteries makes a ridiculously light battery as well. One of my friends runs these batteries and I was so surprised by how light it was.

https://shop.antigravitybatteries.com/products/starter-batteries/automotive/rs-30/

[WP0ZZZ]

Are those batteries a direct replacement for conventional ones? Any drawbacks other than price?

[Eric at Pelican Parts]

Yep, direct replacement, he didn't do anything other than swapping the batteries. Its been about four months with the battery and he hasn't had any issues with it, and his car gets driven only two times a week at most.

[vansicklenmi]

Thanks Eric.

The seller tried in in his 2018 718 and it fit but it would not start the car (and yes it was charged). So I'm double checking before I buy a $2,000 battery. Maybe the new cars electronics have a special digital signal that my old "analog" car can't provide.

[Eric at Pelican Parts]

While this thread is old, there's a few other options in here:

Dry cell battery recommendation

Hope this helps you a bit!

[Cory M]

$2000 for a battery? You can buy about 15 lightweight odyssey batteries for that much...

[adias]

Originally Posted by Eric at Pelican Parts

Antigravity batteries makes a ridiculously light battery as well. One of my friends runs these batteries and I was so surprised by how light it was.

https://shop.antigravitybatteries.com/products/starter-batteries/automotive/rs-30/

Li-Ion... I would be concerned about having one in a 30+ yo car. Li is very unstable.

[darrin]

I note that the porsche battery is also a lithium ion (and not lead acid) battery -- lithium ion cells have different voltages than lead acid cells, which could present a different total battery voltage than an equivalent lead acid battery -- further, lithium ion batteries have different charging requirements than lead acid batteries and can have potential volatility issues if improperly charged (recall the samsung burning cell phone fiasco, etc.) -- Best to do a bit more research on this before dropping that kinda coin -- seem to be a lot of less $$$ and more conventional options for weight loss here.

[vansicklenmi]

Thanks for all the financial advise. The difference in the old lead acid dinosaur battery and the new lithium ion is why I'm asking the question. I believe new cars come OE with a lead acid but this battery is an option on new GT3 RS and others

I already have an Odyssey in the car, but its heavy. I've been looking @ Braille batteries too, but the "factory" Motorsport battery has more "cache".

If you understand what I mean.

[H-viken]

Poor Man's Lightweight Battery

[H-viken]

Lucky Man's Lightweight Battery

[Targalid]

I have three years on this battery so far. Works well for me. Weighs around fourteen pounds.
https://www.amazon.com/Shuriken-SK-BT20-Battery-Watts-Amps/dp/B00NF0R5XC?SubscriptionId=AKIAILSHYYTFIVPWUY6Q&tag=duckduckgo-d-20&linkCode=xm2&camp=2025&creative=165953&creativeASIN=B00NF0R5XC

[WP0ZZZ]

Originally Posted by Targalid

I have three years on this battery so far. Works well for me. Weighs around fourteen pounds.
https://www.amazon.com/Shuriken-SK-BT20-Battery-Watts-Amps/dp/B00NF0R5XC?SubscriptionId=AKIAILSHYYTFIVPWUY6Q&tag=duckduckgo-d-20&linkCode=xm2&camp=2025&creative=165953&creativeASIN=B00NF0R5XC

When they say 600 Watts what kind of power are they referring to? It doesn't sound like much.

[vansicklenmi]

"I know I'm talking cause I recognize my own voice" I'm not looking for some sort of homemade alternative.

And the price is not the issue either.

I just want to know if this specific battery will start my car from someone that has knowledge of these batteries.

Anyone?

[uwanna]

Originally Posted by darrin

I note that the porsche battery is also a lithium ion (and not lead acid) battery -- lithium ion cells have different voltages than lead acid cells, which could present a different total battery voltage than an equivalent lead acid battery -- further, lithium ion batteries have different charging requirements than lead acid batteries and can have potential volatility issues if improperly charged (recall the samsung burning cell phone fiasco, etc.) -- Best to do a bit more research on this before dropping that kinda coin -- seem to be a lot of less $$$ and more conventional options for weight loss here.

If you research, you will find that most automobile "lithium ion" batteries are indeed lithium iron phosphate batteries (LiFePO4), NOT the type of battery that sets cell phones on fire.
This from an FAQ on Lithium auto batteries:
I've heard old stories about lithium catching on fire ??
- Not these type. These are new LiFePO4 type, iron phosphate. No chance of that happening. Very safe, much safer than carrying around a bunch of highly flammable gasoline !

[Jesse16]

So my optima (oops, not odyssey) is nearing 10 years old and has been along for nearly 100k of driving. It does get some trickle charging at times in the winter and lives in a heated garage. Would anyone really trust one of the small/light battery options for a car that goes out in the world on long multi-thousand mile drives away from home for a week at a time having to start multiple times a day with no ability to set up a charger at night ? (not talking about that super pricey anti-gravity thing above) Anyone have experience using small batteries in all conditions ?

[darrin]

Originally Posted by uwanna

If you research, you will find that most automobile "lithium ion" batteries are indeed lithium iron phosphate batteries (LiFePO4), NOT the type of battery that sets cell phones on fire.
This from an FAQ on Lithium auto batteries:
I've heard old stories about lithium catching on fire ??
- Not these type. These are new LiFePO4 type, iron phosphate. No chance of that happening. Very safe, much safer than carrying around a bunch of highly flammable gasoline !

UWanna --Thanks for the clarification -- my concern stemmed from the battery's location adjacent to the gas tank, but the info you provided (and further research) confirms that these LiFePO4 batteries do not pose a fire risk -- further, their voltage is quite close to a lead acid battery (3.2v per cell x 4 cells = 12.8v vs 2.1v per cell x 6 cells = 12.6v for a lead acid battery). Finally, reviewing this link https://earthxbatteries.com/engine-charging-systems-use-lithium-batteries, it looks like the LiFePO4 battery will charge just fine with a standard alternator.

Only issue I see is that cold weather (-10c, or 14f) looks to sap a LiFePO4 battery's strength more significantly than a lead acid battery.

[Cory M]

Originally Posted by vansicklenmi

Thanks for all the financial advise. The difference in the old lead acid dinosaur battery and the new lithium ion is why I'm asking the question. I believe new cars come OE with a lead acid but this battery is an option on new GT3 RS and others

I already have an Odyssey in the car, but its heavy. I've been looking @ Braille batteries too, but the "factory" Motorsport battery has more "cache".

If you understand what I mean.

Originally Posted by vansicklenmi

"I know I'm talking cause I recognize my own voice" I'm not looking for some sort of homemade alternative.

And the price is not the issue either.

I just want to know if this specific battery will start my car from someone that has knowledge of these batteries.

Anyone?

Just buy the battery if you want it that badly. Or call the Porsche dealer and ask them. Obviously most people on this DIY forum don't think it's worth an additional $1900 to save 3 pounds over a proven solution. Good luck.