BATTERY QUESTION
Three Wheelin'
Joined: Jan 2007
Posts: 1,797
Likes: 358
From: Central Massachusetts
I installed a new Duracell battery a couple of weeks ago after experiencing slow starts and auto start/start ceased to work. My voltmeter at the time was showing 15-15.3 at the time. Now it is still showing 15.0 in both sport and normal modes. Seems like I do indeed need a reset of the charging system? What is the cheapest device that I can use for this? I already have a durametric (which does lots of stuff but not this function) so low cost as long as it covers this function is what I want. What would be even better is a device that could also work on my Audi.
Advanced
Joined: Feb 2017
Posts: 80
Likes: 20
I installed a new Duracell battery a couple of weeks ago after experiencing slow starts and auto start/start ceased to work. My voltmeter at the time was showing 15-15.3 at the time. Now it is still showing 15.0 in both sport and normal modes. Seems like I do indeed need a reset of the charging system? What is the cheapest device that I can use for this? I already have a durametric (which does lots of stuff but not this function) so low cost as long as it covers this function is what I want. What would be even better is a device that could also work on my Audi.
Three Wheelin'
Joined: Jan 2007
Posts: 1,797
Likes: 358
From: Central Massachusetts
Thanks but I have driven a few hundred miles since install and was hoping to see the voltage drop but no such luck. Also it has not been all too cold here in MA since then. Most days I have driven were 40's and 50's. 28 degrees last night and still consistently at 15.0 no matter the ambient temp. *** started working again immediately after I installed the new battery.
Race Car
Joined: Oct 2004
Posts: 3,899
Likes: 219
The Porsche "book" charge for a battery replacement is one hour. The Porsche billing rate in my area, Md, is $170 an hour. So your total charge should be around $400, if a Porsche tech installs the battery. An indy's charge will be less.
Race Car
Joined: Oct 2004
Posts: 3,899
Likes: 219
Yo can customize your display. Just toggle through the menu options and you will come across voltage display. Moreover, you may also find other items that you may want to display, other than the factory default settings.
Advanced
Joined: Feb 2017
Posts: 80
Likes: 20
Thanks but I have driven a few hundred miles since install and was hoping to see the voltage drop but no such luck. Also it has not been all too cold here in MA since then. Most days I have driven were 40's and 50's. 28 degrees last night and still consistently at 15.0 no matter the ambient temp. *** started working again immediately after I installed the new battery.
Pro
Joined: Jan 2018
Posts: 522
Likes: 246
From: America's Dairyland
Thanks but I have driven a few hundred miles since install and was hoping to see the voltage drop but no such luck. Also it has not been all too cold here in MA since then. Most days I have driven were 40's and 50's. 28 degrees last night and still consistently at 15.0 no matter the ambient temp. *** started working again immediately after I installed the new battery.
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Intermediate
Joined: Dec 2018
Posts: 47
Likes: 17
Just did my 2017 991.2 C2S battery
For others information. My battery has been showing signs of distress. It's the original to the car and 3.5-4 years is standard in Phoenix as the heat is death on batteries.
Originally went to local parts store (Autozone) to minimize off battery time but they did not have part number so I had to pull battery and take to them. The 991.1 instructions work fine. It's an easy job. 10-15 minutes.
Took battery to Autozone. Almost immediately the guy there identified the battery. I replaced with a duralast platinum H7-AGM although I could have used the gold version. $200 OTD. My sense from them was that the H7 battery is a very common size.
It fit into car perfectly and installed fine. Cranks great. I lost no setting or information on the car that I can tell including all driving histories. I generally drive in sport + so I can't tell about the stop/start. I will not be sad if that feature is not working for some reason.
*update* stop/start back with a vengeance. Tonight I drove in standard mode and stop/start was working fine.
Originally went to local parts store (Autozone) to minimize off battery time but they did not have part number so I had to pull battery and take to them. The 991.1 instructions work fine. It's an easy job. 10-15 minutes.
Took battery to Autozone. Almost immediately the guy there identified the battery. I replaced with a duralast platinum H7-AGM although I could have used the gold version. $200 OTD. My sense from them was that the H7 battery is a very common size.
It fit into car perfectly and installed fine. Cranks great. I lost no setting or information on the car that I can tell including all driving histories. I generally drive in sport + so I can't tell about the stop/start. I will not be sad if that feature is not working for some reason.
*update* stop/start back with a vengeance. Tonight I drove in standard mode and stop/start was working fine.
Last edited by pittspilot; Jan 20, 2020 at 05:25 AM.
