Proper Battery Tender hook-up on 991.2
06-21-2020, 02:54 PM
#76
Rennlist Member
I do not see how attaching a spare battery (or a battery pack) to the installed battery makes any difference to a sensor. And since my battery maintainers are connected to each battery post, no issues there either.
06-21-2020, 03:14 PM
#77
Although there are instructions for jump starting, I couldnt find anything on low amperage trickle chargers from Porsche. Then i saw that video and because I could not find anything from Porsche on trickle charges, I posted here. Currently I have the quick adapter hooked directly to the battery posts. The chsrger is on a power strip I always turn off before plugging or unplugging it to the car. I was hoping i was safe but just making sure
You mean the Youtube video says. What does Porsche say in a bulletin? And in the video, he is using a battery pack and not a running vehicle to jump start it. When using a running vehicle to jump start your vehicle, yes there are precautions to take and not just for a sensor.
I do not see how attaching a spare battery (or a battery pack) to the installed battery makes any difference to a sensor. And since my battery maintainers are connected to each battery post, no issues there either.
I do not see how attaching a spare battery (or a battery pack) to the installed battery makes any difference to a sensor. And since my battery maintainers are connected to each battery post, no issues there either.
06-21-2020, 05:28 PM
#79
Rennlist Member
A friend of mine with an E30 BMW lost his ~$1500 ECU during a jump start from another vehicle. Back then, there were no specific instructions on how to go about it in the owner's manual; there are now. Anyone designing the ECU should at least put some over-voltage protection in them...I am sure that has changed.
06-21-2020, 05:30 PM
#80
Given that winter is here in the Northeast I will not be driving my Carrera T very much. I am planning to hook-up one of my existing Deltran Battery Tenders to maintain the battery.
I plan to aligator clip direct to the battery. Safe to connect the negative directly to the negative terminal of the battery or should I connect to the body for ground?
i know that a lot of members have the Porsche AKA: CTEK charger which also can connect to the cigarette lighter socket but I prefer to use one of the Battery Tenders which I already own. My Battery Tenders are intelligent and support AGM batteries which I believe is the type of Battery Porsche installs from the factory.
Thanks.
I plan to aligator clip direct to the battery. Safe to connect the negative directly to the negative terminal of the battery or should I connect to the body for ground?
i know that a lot of members have the Porsche AKA: CTEK charger which also can connect to the cigarette lighter socket but I prefer to use one of the Battery Tenders which I already own. My Battery Tenders are intelligent and support AGM batteries which I believe is the type of Battery Porsche installs from the factory.
Thanks.
09-23-2020, 05:27 PM
#81
Track Day
Join Date: Oct 2014
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It looks like most people picked up extra bolts to directly hook up the battery tender to the battery (rather than using the existing bolt). Can someone let me know what the bolt size is? I didn't have one in the garage that fit it, thus need to pick 2 up.
09-24-2020, 01:32 PM
#82
Burning Brakes
991.2 Neg Terminal Connection
991.2 Battery Tender Hookup
This setup has worked well for me in both my 2019 (991.2) Targa, and 2015 (981) Cayman.
Take care and drive safe.
The following 2 users liked this post by 981KMAN:
quattroboy (09-24-2020),
Rich_Jenkins (09-26-2020)
09-26-2020, 08:00 AM
#83
Advanced
No bolts needed. Use the existing. What you need is an extra NUT to go on the existing bolts. I simply used two M6-1.0 Stainless Steel nuts (77 cents @ Home Depot) and piggybacked the existing connector threads. I also used a little removable thread locker and snugged them down.
*GREAT PIC* 991.2 Neg Terminal Connection
*GREAT PIC* 991.2 Battery Tender Hookup
*GREAT PIC* 991.2 Neg Terminal Connection
*GREAT PIC* 991.2 Battery Tender Hookup
The following users liked this post:
tourenwagen (02-19-2021)
09-26-2020, 06:21 PM
#84
Why not use the cigarette lighter on those cars with that option. Both my '19's have charged great with CTEK charger all winter long. Same charger Porsche, Ferrari etc put their name on and double the price.
09-26-2020, 06:31 PM
#85
Burning Brakes
My answer is that I already owned 3 Deltran Battery Tender Plus units that I move between the cars, lawn tractor, Wave Runners, etc... So having a quick connect going directly to the battery was the best option. This way I do not have to have the cigarette adapter, or run the cord out the door, risking seal damage, or leaving the window open, as the cord exits the hood by the wipers.
Maybe its just a matter of preference... Lots of good ways to get the same job done.
Last edited by 981KMAN; 09-26-2020 at 06:36 PM.
10-05-2020, 02:09 PM
#86
Instructor
Good question........
My answer is that I already owned 3 Deltran Battery Tender Plus units that I move between the cars, lawn tractor, Wave Runners, etc... So having a quick connect going directly to the battery was the best option. This way I do not have to have the cigarette adapter, or run the cord out the door, risking seal damage, or leaving the window open, as the cord exits the hood by the wipers.
Maybe its just a matter of preference... Lots of good ways to get the same job done.
My answer is that I already owned 3 Deltran Battery Tender Plus units that I move between the cars, lawn tractor, Wave Runners, etc... So having a quick connect going directly to the battery was the best option. This way I do not have to have the cigarette adapter, or run the cord out the door, risking seal damage, or leaving the window open, as the cord exits the hood by the wipers.
Maybe its just a matter of preference... Lots of good ways to get the same job done.
Last edited by barrios35; 10-05-2020 at 02:18 PM.
10-05-2020, 02:20 PM
#87
Burning Brakes
My thoughts exactly on the seal on the doors. Also, wondering on fender scuffs from the wiring running down the battery. Definitely many option to get the job done. I have used a cheap floater on a Cayenne for years with no issues. Decided on buying a CTEK for the 911 for fear of. LOL I did noticed the eye holes are way bigger than the bolts. Are you guys just using the ones that came with the charger or buying the smaller eye hole attachments?
