djtomy

This says it won't fit but the specs are the same. Does anyone have a link?

MMaynard

SLI49AGM Duracell Ultra Platinum is what I put in my 14 CS

djtomy

thank you! that will be my replacement.

kisik

Can anyone help to identify the age of Banner Battery? There is no typical production month/year sticker anywhere.

afflux

I'm also interested in knowing this. I assume mine is the original, but would like to be sure.

PS-GT4

Personally I’m not a fan of the AGM batteries from Autozone. Idk if it’s just their version or if all automotive AGM batteries are short lived. It was replaced one time under the 3 year warranty and both died in under 2 years in a regularly driven vehicle. Made the mistake twice - would rather stick with lead/acid or LION (if budget permits).

FWIW I did buy an autozone H5 AGM for my GT4 less than 2 months ago, but that was before the other on noted above in my Land Cruiser died again. Given the knowledge I have now - would have just gotten the OE battery from the local VW dealer.

Rich_Jenkins

The stamp on the negative post appears to read 01 14, suggesting January '14.

Rich_Jenkins

This 70 Ah Duracell battery from Batteries Plus is what I put in my '14 981S a couple years ago:

https://www.batteriesplus.com/productdetails/sli48agm

I picked the 70 Ah because my car already had a 70 Ah Banner as OEM, so I would not have to fiddle with any of the BMS settings afterwards. I rather suspect it would not have mattered, but I am kinda OCD about this. For my 991.2 I upgraded the battery to a 92 Ah when I swapped it out a few months ago, because I was planning to have the dealer reset the BMS at the next service visit anyway.

txbdan

Yep, I believe this is the build date. I have two stock batteries on hand and the numbers agree with when I think they were made.

KBell

FYI

Last year, I replaced my battery with a reputable brand.
I did not "sync" my new battery to the car.
My new battery died within a year.
Got a replacement, put in in, and drove to PORSCHE to have it synced.
All good.
Some people have done fine with just replacing their battery.
May car did not do well without the "sync" or marriage to the "ECU''

okie981

Here's the one I put in my Boxster S about 10 months ago, an exact form/fit/function replacement in every dimension and electrical performance compared to the Banner OEM battery:

Super Start Platinum Battery Group Size 48 H6 9AGM48 | O'Reilly Auto P (oreillyauto.com)

I did the swap myself, did not do any PIWIS "coding" or "adaptation" of the battery.

My Porsche service tech told me there is no need to do the software/ECU work unless the old battery has reached a very low health or state of charge condition such that you see error messages on the dash display from various computers around the car, or have other weird glitchy behavior that is common on 981/991 and newer cars when the battery health is severely degraded.

981KMAN

I would stay with an AGM (Absorbed Glass Mat) battery. And any Size 48 ( H6) AGM battery will fit just like the OEM Porsche (Banner) battery.

Just recently replaced my OEM battery after 7 years of service. Stayed with the same size ( H6 ) as the original battery, actually used another Porsche (Banner) battery as I could get a very good price from my local dealer. Note the date stamp on the Negative Terminal (18 21), so the battery was manufactured the 18th week of 2021.



Coding in the new battery is very easy if your OBDII tool has that capability. My OBDII unit does. It took less than 5 minutes. New battery working perfect!

If you do your own Oil Changes, the unit is a good device as it will reset the Oil Change light, Service reminder light, Battery Service, Electric Parking Brake Adj/Calibration and a few more common DIY service functions.

Drive safe.

okie981

What does the Batter Tracker device do?

981KMAN

The "Battery Tracker" is from Antigravity Batteries, their "Lead-Acid" version.

It measures/monitors the Battery Voltage so you can "track" the health of your battery. It will show you when your battery starts to degrade and weaken, as the Starting Voltage will drop below a healthy level. Plus you can see how your battery recovers from use, such as popping the frunk.




Its useful, yet more off a "Fun to play with toy", rather than a "must have" set of information.

okie981

Are the AGM batteries considered "Lead-Acid" technology? I think they are, but not sure.