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because of the panedemic I have not been driving my vehicles as I would! So, was wondering how to determine the health of Porsche batteries? When I drive the cars, I see the voltage display ranging between 13.8-14.4 - I am not sure what to make of that ..any thoughts or pointers?
Are you checking voltage with engine on or off? Measurement with car Running should be alternator voltage. Measurements with car off is battery voltage I believe. 12.6v or so is around battery voltage and 12v or under should be battery about to go if not already dead.
why not get a battery tender and use it if car is not in use. The in car porsche tender is easy to use and just got one from dealer. I used to use a generic one that connects to leads on battery frunk side But was a pain removing plastic trim each time.
Are you checking voltage with engine on or off? Measurement with car Running should be alternator voltage. Measurements with car off is battery voltage I believe. 12.6v or so is around battery voltage and 12v or under should be battery about to go if not already dead.
why not get a battery tender and use it if car is not in use. The in car porsche tender is easy to use and just got one from dealer. I used to use a generic one that connects to leads on battery frunk side But was a pain removing plastic trim each time.
I have two tenders one for the light weight battery for my RS and one regular one for my Turbo
they are both CTEK tenders - didn’t know that I can have an app and monitor charging on the phone?
also, the above are all voltage with the car engine on
how do you check it with the engine off? Just turn it on but not all the way to ignition?
Your voltage when driving are right in the pocket and those will flutuate continually but that range is perfect....
When your car is sitting it should be in the 12.6v to 12.8v ranage if not overdischarge at all... that is the typcial resting/nominal voltage... Lithium would be 13.2 to 13.3 most the time. You can't buy a cheap Multi-Meter most anyplace like a Hardware Store, Auto Store, And then you check the battery directly at the terminals when the car is not running. That will give you the basic voltage reading, which should be in the range I mentioned above. As Nanook said you can also use a Antigravity Battery Tracker and not have to access the battery at all and get the reading on your Phone or other Bluetooth device for a bit of convenience.
but a decent voltage is not the full storey all the time... if you getting flags or having trouble starting every few days that indicates a battery that is over-discharged or potentially on its last legs. Because sometimes a battery cannot handle a load like starting well, but still reads fine on voltage. The down and dirty is.... it your car starting well, and does it start well after sitting for a few weeks. If so most likely perfectly fine.
how do you check it with the engine off? Just turn it on but not all the way to ignition?
You check with ignition in position 1 and engine not running. Battery is few years old and when sitting I get 12.3 or 12.4. I usually leave car on tender since I only drive my car once a week or so or even longer.
Same here. My battery starts at 13.4 then bumps up to 14.4.
Just going to aux power (not starting the car, just 1st key position), battery in my GTS, GT3, and TTS would show in range of 11.8-12.2 V. When running, my GTS would get up to 14.9-15.0V sometimes. GT3 ran at about 14.7V. So far TTS running about 14.0-14.4 but I'm just starting to drive it more.
How old is your battery? How long have you gone without running the car? Batteries last about ~4/5 years before they start having issues (if it is properly maintained)
I use the TopDon AB101 tester and test the battery every so often. It's a pretty useful and cheap tool. It not only checks your battery status but the alternator as well.
How old is your battery? How long have you gone without running the car? Batteries last about ~4/5 years before they start having issues (if it is properly maintained)
I use the TopDon AB101 tester and test the battery every so often. It's a pretty useful and cheap tool. It not only checks your battery status but the alternator as well.
the batteries I am concerned about are my RS and TTS are 2016, my CTT is also 2016
usually a couple of weeks go by without driving but they all start right back up like a champ when I start them
the RS battery is the super light Porsche battery so I am a little more worried about that one....I will try what has been advised above and see where they all are
I'm surprised no one mentioned a load tester as the best way to check a battery. If you don't have one, I believe the auto parts stores will test it for you.
I was able to test my RS light weight battery, under option 1 (probably after 8 days of sitting idle), before starting the ignition on the car, the battery showed 12.9 - 13V
What do you think that says? Its in decent shape?
I'm surprised no one mentioned a load tester as the best way to check a battery. If you don't have one, I believe the auto parts stores will test it for you.
07-04-2020, 01:05 PM
How to determine your Porsche's battery health?
