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I got the Porsche battery charger and set it up today to see if it works. I have the 12V end plugged into the footwell outlet and mode set to “Lithium”. I locked the car per instructions. None of the indicator lights go on. What am I doing wrong?
There are a number of threads on the exact procedure….but I think it goes something like this (?):
(1) Start car,
(2) Turn off
(3) Plug charger into footwell 12v port.
(4) Lock car
(5) Plug charger into AC outlet and select Li charging.
I believe you have about 15-30 minutes to plug the charger and activate before the cigarette port goes inactive.
If you want to bypass all this silliness, open the frunk, remove the protective covering over the battery and charge directly (ie connect directly to the battery). That’s how I do it, and I think it also has a benefit of charging quicker than through the 12v port in the foot well.
I do it because I've had my 911 batteries die on me a couple of times while sitting unused for several weeks in the winter. I've never had this many battery problems with any other car I've owned - American, Japanese, German. Only with Porsches - there is no substitute.
I'll be away skiing for a couple of weeks at the end of the year and a dead battery in a 911 (or other modern cars) is a pain. The battery is in the frunk, which can only be opened via the electric switch next to the driver's seat. Which is inoperative when the battery is dead. So you require a booster battery, which needs to be attached to terminals located in the fuse block in the driver's footwell, to open the frunk. So you can get to the battery and either jump start the car or replace the battery. It's a pain. As is this, but I find this the preferable pain.
I do it because I've had my 911 batteries die on me a couple of times while sitting unused for several weeks in the winter. I've never had this many battery problems with any other car I've owned - American, Japanese, German. Only with Porsches - there is no substitute.
Lol -- sorry to hear your troubles. Haven't had that experience.
Yeah, it could be my stupidity - doing something with the Porsche I shouldn't, or not doing something I should. Anyway, I don't go through the battery maintainer thing often, only when I know the car is going to sit for a while.
That’s how I do it, and I think it also has a benefit of charging quicker than through the 12v port in the foot well.
I have the standard/AGM battery but it's interesting that you say this because it does seem to take MUCH longer to charge than the exact same charger did on my 991.2. I thought something was wrong at first but it consistently takes a long time, so perhaps something is different on the 992. Both vehicles charged through footwell port.
I also notice on my 992 that after taking a drive, no matter the time/distance, the charger always starts from the 50% level and takes quite a while to reach the 75% level and finally the 100% level (I have the old Multi US 7002 with the 4 stages). On my 991.2, it would rarely even dip to the 50% level and would jump to 75% and 100% very quickly.
Oh well, I guess this is all normal operation on the 992. I assume if the charger shows 100% charged, the battery is indeed fully charged. But after ~2 months of ownership, I'm still not quite used to the difference from my 991.
With the lithium battery and the Porsche charger connected through the footwell, the indicator lights started at 25% yesterday afternoon. I would be shocked if the battery was really that low. This morning it was 100%, and still lit up. I packed it up and will reconnect before I leave the car for couple of weeks.
I have the standard/AGM battery but it's interesting that you say this because it does seem to take MUCH longer to charge than the exact same charger did on my 991.2. I thought something was wrong at first but it consistently takes a long time, so perhaps something is different on the 992. Both vehicles charged through footwell port.
I also notice on my 992 that after taking a drive, no matter the time/distance, the charger always starts from the 50% level and takes quite a while to reach the 75% level and finally the 100% level (I have the old Multi US 7002 with the 4 stages). On my 991.2, it would rarely even dip to the 50% level and would jump to 75% and 100% very quickly.
Oh well, I guess this is all normal operation on the 992. I assume if the charger shows 100% charged, the battery is indeed fully charged. But after ~2 months of ownership, I'm still not quite used to the difference from my 991.
There’s no question in my mind, based on my experience, with my Li battery, that charging directly connected to the battery is MUCH quicker than going through the 12v port.
Of course you can use other brand batteries - but if you have LiFePO4's it's going to cost you a bundle and upwards of $1,200 bucks. Thus insurance by getting an $80 dollar CTEK charger/maintainer is a no brainer.
I don't think Varta sells batteries in the US (car batteries that is), the closest you can get are Interstate and what we used when test driving for VW/Audi/Bentley. I've got them on every vehicle I own: camper, bobcat, Touareg and Macan.
Last note, do NOT connect (if charging via battery) the negative cable to the battery. There's a dedicated ground post; use that.
12-07-2021, 11:52 AM
Lithium battery charging
