Does the GT3 have an AGM battery?
09-27-2015, 11:59 AM
#16
Drifting
I know that this is an old post but the picture of the battery shown above does not appear to be an AGM battery. I have a GT4 and have been asking the same question to determine if it came with a AGM battery. Based on seeing the vent tube I assume it is a regular lead battery. The part # is 999.611.070.12 Banner 12V 70 Ah 760 A. Anyone able to confirm? Thanks
10-04-2015, 06:32 PM
#17
I went to two separate Porsche Dealerships in the area and both confirmed that the battery is a typical Lead battery not a AGM. The newer cars that have the capability to shut off and restart at a stop light use AGM batteries and I am now 100% sure that this one is not. The GT4 and GT3 appear to use the typical Lead battery. All the other vehicles list AGM on the battery. Call your Porsche Dealership. They should be able to confirm. I too wish this was an AGM but unfortunately its not.
10-04-2015, 09:27 PM
#18
Race Director
I know that this is an old post but the picture of the battery shown above does not appear to be an AGM battery. I have a GT4 and have been asking the same question to determine if it came with a AGM battery. Based on seeing the vent tube I assume it is a regular lead battery. The part # is 999.611.070.12 Banner 12V 70 Ah 760 A. Anyone able to confirm? Thanks
I went to two separate Porsche Dealerships in the area and both confirmed that the battery is a typical Lead battery not a AGM. The newer cars that have the capability to shut off and restart at a stop light use AGM batteries and I am now 100% sure that this one is not. The GT4 and GT3 appear to use the typical Lead battery. All the other vehicles list AGM on the battery. Call your Porsche Dealership. They should be able to confirm. I too wish this was an AGM but unfortunately its not.
Only replace the battery with one that satisfies
the specific requirements of the vehicle.
The vehicle is designed specifically for AGM
(Absorbent Glass Mat) batteries. The vehicle’s
full functionality is only guaranteed with an
AGM battery.
Also, the OP of this thread checked with Banner, the manufacturer of the GT3 battery, and they confirmed that it is an AGM. See post #6.
10-04-2015, 09:54 PM
#22
Maybe it's different in the GT4 as the part number is different. I started investigating the battery in the GT4 because I really wanted it to be an AGM battery. I will continue to investigate. Thx
10-04-2015, 10:00 PM
#23
Race Director
Kelsey, see if it says anything in the battery section of the GT4 owner's manual. Since it's so specific in the GT3 manual you'd think the GT4 manual would reference it too, if it has an AGM....
10-04-2015, 10:43 PM
#24
Rennlist Member
The GT4 owners manual does not have the same verbiage as that of the GT3 regarding the battery. From Page 207 of the GT4 manual:
"Replacing the battery
The battery is subject to normal wear: its service
life depends heavily on the care you give it,
climatic conditions and the conditions of use
(distances, loads).
It is not possible to use the details on the battery
case to determine a comparable battery that
meets all the specific requirements of Porsche.
> Have the battery removed and installed only by
your authorized Porsche dealer.
> Only use an original Porsche battery, with the
correct part number, as a replacement. Only
this battery meets the specific requirements of
the vehicle.
>After you install a new battery, it must be
initialised in the control unit.
Please contact your authorized Porsche
dealer.
> Please observe the disposal instructions for
batteries."
From Page 216 of the GT3 manual:
Replacing the battery
The battery is subject to normal wear: its service
life depends heavily on the care you give it,
climatic conditions and the conditions of use
(distances, loads).
It is not possible to use the details on the battery
case to determine a comparable battery that
meets all the specific requirements of Porsche.
Information
> After you install a new battery, it must be
initialised in the control unit.
Please contact an authorized Porsche dealer.
> Have the battery removed and installed only by
your authorized Porsche dealer.
> Only replace the battery with one that satisfies
the specific requirements of the vehicle.
The vehicle is designed specifically for AGM
(Absorbent Glass Mat) batteries. The vehicle’s
full functionality is only guaranteed with an
AGM battery.
We recommend that you use a genuine
Porsche battery.
> Please observe the disposal instructions for
batteries."
In addition, my GT4's battery is an Exide, not a Banner as is the one on my GT3.
"Replacing the battery
The battery is subject to normal wear: its service
life depends heavily on the care you give it,
climatic conditions and the conditions of use
(distances, loads).
It is not possible to use the details on the battery
case to determine a comparable battery that
meets all the specific requirements of Porsche.
> Have the battery removed and installed only by
your authorized Porsche dealer.
> Only use an original Porsche battery, with the
correct part number, as a replacement. Only
this battery meets the specific requirements of
the vehicle.
>After you install a new battery, it must be
initialised in the control unit.
Please contact your authorized Porsche
dealer.
> Please observe the disposal instructions for
batteries."
From Page 216 of the GT3 manual:
Replacing the battery
The battery is subject to normal wear: its service
life depends heavily on the care you give it,
climatic conditions and the conditions of use
(distances, loads).
It is not possible to use the details on the battery
case to determine a comparable battery that
meets all the specific requirements of Porsche.
Information
> After you install a new battery, it must be
initialised in the control unit.
Please contact an authorized Porsche dealer.
> Have the battery removed and installed only by
your authorized Porsche dealer.
> Only replace the battery with one that satisfies
the specific requirements of the vehicle.
The vehicle is designed specifically for AGM
(Absorbent Glass Mat) batteries. The vehicle’s
full functionality is only guaranteed with an
AGM battery.
We recommend that you use a genuine
Porsche battery.
> Please observe the disposal instructions for
batteries."
In addition, my GT4's battery is an Exide, not a Banner as is the one on my GT3.
10-05-2015, 08:53 PM
#25
Hi Mike, Thanks for the follow-up. So my battery in the GT4 is the Banner Battery and I now have confirmation from the Lead Mechanic at Porsche that it is an AGM battery.
I told the Lead Mechanic that the parts guys at two different dealerships (his dealership included) told me the GT4 comes with a typical Lead Acid battery and not an AGM battery. Since the battery had a vent tube, I figured they were right as my Odyssey Battery in my 07 Boxster S (987.1) does not have a vent tube. However, after reading your posting, I went back and talked with the lead mechanic. He told me that all Porsche batteries (Banner) are AGM batteries. They do not have the tubes where distilled water could be topped up and thus they are AGM batteries. He also told me that even though they are AGM, they still have a vent tube. So there you have it. Thanks so much for your help. That is why I love these forums. Always so educational and helpful. I feel so fortunate to have a GT4 as I am not a 918 owner and was lucky enough to be in the right place at the right time. Thanks again.
I told the Lead Mechanic that the parts guys at two different dealerships (his dealership included) told me the GT4 comes with a typical Lead Acid battery and not an AGM battery. Since the battery had a vent tube, I figured they were right as my Odyssey Battery in my 07 Boxster S (987.1) does not have a vent tube. However, after reading your posting, I went back and talked with the lead mechanic. He told me that all Porsche batteries (Banner) are AGM batteries. They do not have the tubes where distilled water could be topped up and thus they are AGM batteries. He also told me that even though they are AGM, they still have a vent tube. So there you have it. Thanks so much for your help. That is why I love these forums. Always so educational and helpful. I feel so fortunate to have a GT4 as I am not a 918 owner and was lucky enough to be in the right place at the right time. Thanks again.
10-05-2015, 10:55 PM
#26
Race Director
Hi Mike, Thanks for the follow-up. So my battery in the GT4 is the Banner Battery and I now have confirmation from the Lead Mechanic at Porsche that it is an AGM battery.
I told the Lead Mechanic that the parts guys at two different dealerships (his dealership included) told me the GT4 comes with a typical Lead Acid battery and not an AGM battery. Since the battery had a vent tube, I figured they were right as my Odyssey Battery in my 07 Boxster S (987.1) does not have a vent tube. However, after reading your posting, I went back and talked with the lead mechanic. He told me that all Porsche batteries (Banner) are AGM batteries. They do not have the tubes where distilled water could be topped up and thus they are AGM batteries. He also told me that even though they are AGM, they still have a vent tube. So there you have it. Thanks so much for your help. That is why I love these forums. Always so educational and helpful. I feel so fortunate to have a GT4 as I am not a 918 owner and was lucky enough to be in the right place at the right time. Thanks again.
I told the Lead Mechanic that the parts guys at two different dealerships (his dealership included) told me the GT4 comes with a typical Lead Acid battery and not an AGM battery. Since the battery had a vent tube, I figured they were right as my Odyssey Battery in my 07 Boxster S (987.1) does not have a vent tube. However, after reading your posting, I went back and talked with the lead mechanic. He told me that all Porsche batteries (Banner) are AGM batteries. They do not have the tubes where distilled water could be topped up and thus they are AGM batteries. He also told me that even though they are AGM, they still have a vent tube. So there you have it. Thanks so much for your help. That is why I love these forums. Always so educational and helpful. I feel so fortunate to have a GT4 as I am not a 918 owner and was lucky enough to be in the right place at the right time. Thanks again.
10-05-2015, 11:01 PM
#27
Rennlist Member
I can understand why the GT3 might have a higher amp rating due to its four wheel steering, but not why one GT4 would have a higher amp rating than another. I know that batteries are sometimes swapped out at the Port PDI facility or at the dealer, but you would think they would not put in a lower amp rated battery as a replacement.
By the way, I checked my Turbo S, and it has an 860 amp rated Banner battery, although its owners manual also does not spell out an AGM battery as does the GT3 manual.
Last edited by jfr0317; 10-06-2015 at 09:29 AM. Reason: typos
10-05-2015, 11:19 PM
#28
Rennlist Member
I just heard back from my friend. His GT4, which was delivered in August, has the same battery as my GT4, which was delivered in July.
Given that the GT4 does not have four wheel steering or auto start/stop, I guess I am not surprised my friend's car and mine do not have a higher capacity battery, but I wonder why Kelsey's car does.
Given that the GT4 does not have four wheel steering or auto start/stop, I guess I am not surprised my friend's car and mine do not have a higher capacity battery, but I wonder why Kelsey's car does.
10-06-2015, 10:53 PM
#29
Interesting. Wonder if it's like the tires. Whatever they have on hand is what you get? I got Dunlop tires but really wanted the Michelin Cup tires. Mine arrived in mid June. I can do some checking and I'll let you know what I find out.