Welcome to 911UK
The only place for Porsche, 911uk is the definitive enthusiast and resource site for the Porsche 911.
Registration is fast, simple and absolutely free, so join up today for full access to the site and benefit from latest member offers.

Porsche Classifieds
Sell Your Porsche on 911uk
Create a Free Classified Advert
Search Ads
Classified Adverts FAQ
Trade Classified Information
Buyer & Seller Fraud Protection
Consumer Rights Act
Pre Purchase Inspection (PPI)
Porsche Car Sourcing
Porsche Cars Wanted
Official Porsche Centre Reviews
Model
Stock
Porsche 911
992 : 2019- 0
991 : 2011- 24
997 : 2004- 66
996 : 1997-2005 35
993 : 1993-1998 4
964 : 1989-1993 1
Carrera 3.2 : 1983-1989 2
Carrera SC : 1977-1983 2
930 Turbo : 1975-1989 1
Early 911 : 1964-1977 1
Porsche Other Models
Classic : 1950-1965 0
Boxster : 1997- 30
Cayman : 2005- 21
Cayenne : 2003- 6
Macan : 2014- 4
Panamera : 2009- 0
912-914-924-928-944-968 1
959 - CarreraGT - RaceCar 0
Car Parts For Sale & Wanted
Other Items For Sale & Wanted
Wheels Tyres For Sale & Wanted
Number Plates For Sale Wanted

Porsche Services
Porsche Body Shop Repair
Paint Protection & Wrapping
Porsche Classic Insurance
Porsche Classic Parts
Porsche Classic Restoration
Porsche Design Collection
Porsche Engine Gearbox Rebuild
Porsche Heritage & History
Porsche News
Porsche Picture Gallery
Win a New Porsche 911

Porsche Parts
Body Parts, Body Styling
Brakes, Clearance
Electrical, Exhausts
Engine Cooling, Engine Electrical
Engine Rebuild, Heating Cooling
Interior Incar, Lighting
Rubber Seals, Service Parts
Steering, Suspension
Transmission, Workshop Tools
Early 911, 911 - 930, 928 - 968
964 - 993, 996 - 997, Boxster
Cayman, Cayenne, Panamera

Porsche Model Range
911 [992] 2018-Current
Porsche 911 [992]
911 [991] 2011-2019
Porsche 911 [991]
911 [997] 2004-2012
Porsche 911 [997]
911 [GT] GT1-GT2-GT3
Porsche 911 [GT]
911 [996] 1997-2005
Porsche 911 [996]
911 [993] 1993-1998
Porsche 911 [993]
911 [RS] RS-RSR
Porsche 911 [RS]
911 [964] 1989-1993
Porsche 911 [964]
911 3.2 1983-1989
Porsche 911 3.2 Carrera
911 SC 1977-1983
Porsche 911 SC
911 [Early] 1964-1977
Porsche 911 [Early]
Boxster & Cayman
Porsche Boxster & Cayman
Cayenne & Panamera
Porsche Cayenne & Panamera

911uk Site Partners

Post new topic   Reply to topic
Author Message
40Anni996
Silverstone


Joined: 22 Apr 2009
Posts: 135



PostPosted: Tue Dec 03, 2019 10:38 am    Post subject: Battery Dead - CTEK question Reply with quote

I keep my battery on trickle charge via a CTEK MXS 5.0 as I sadly don't get to drive it very frequently.

Woke up to a sunny Sunday last weekend and excitedly jumped in for a spirited drive only to find the battery not able to turn the car over and to add insult to injury I was then deafened by the alarm going off in the garage. I tried a couple of CTEK regenerations on it over the weekend but it keeps tripping out at stage 5 (according to the manual this means the battery won't hold a charge).

I have a Bosch S5 010 in the car which is around 5 years old. I know these cars are hard on batteries but it did surprise me a little that the battery has gone this quickly when it's always been kept on trickle charge.

I'll buy a replacement but my question is this; could it be the way I'm charging the battery that has led to its unexpectedly short life?
Until a year or so ago I used to charge it via the ciggy lighter socket but after a couple of episodes of the CTEK dropping out I figured it might be more reliable to switch to charging via the battery terminals in the front. Easy enough to leave the clips on the terminals permanently and just pop the frunk lid and unplug the extension cable each time I take the car out.

The CTEK manual instructs charging via battery + and - terminals and looking at the 996 FAQ on battery issues it seems others also charge this way, but digging around I have found a PH post which says you must use an earthing point rather than the battery negative or you're likely to reduce the life of the battery as you miss out the 'little black box' that provides feedback on the status of the battery to the charging source. Is this true for the CTEK MXS 5.0 does anyone know or is it clever enough to not require this? Could connecting directly to the terminals have contributed to my battery's (relatively) short life?
_________________
2004 996 C2 40th Anniversary

I have a keen eye for derail
 
  
View user's profile Send private message
   
T8
General
General


Joined: 29 Jun 2010
Posts: 16134
Location: Kent


PostPosted: Tue Dec 03, 2019 10:50 am    Post subject: Reply with quote

Personally I reckon 5 years on a battery that's hardly been charged by use is pretty good. Dont know
_________________
2007 Guards Red 997 Turbo Tiptronic
ex 2004 Polar Silver 996T Tiptronic
ex 2002 Seal Grey 996.2 C4 Tiptronic
ex 1978 Silver 924 Manual
 
  
View user's profile Send private message
   
40Anni996
Silverstone


Joined: 22 Apr 2009
Posts: 135



PostPosted: Tue Dec 03, 2019 10:58 am    Post subject: Reply with quote

Thanks T8. So charging through driving > trickle charging from a battery's perspective? Gives me another good reason to drive it more frequently...
_________________
2004 996 C2 40th Anniversary

I have a keen eye for derail
 
  
View user's profile Send private message
   
don0301
Newbie


Joined: 03 Dec 2019
Posts: 4



PostPosted: Tue Dec 03, 2019 11:03 am    Post subject: Reply with quote

Hello

I have no experience with 911's BUT:

I have an Audi RS6 ("smart" battery in the boot) and this car must be charged (trickle charged) by terminals in the engine bay, not on the battery terminals. The reason given is the car "monitors" current use and therefore the battery must not be charged etc directly whilst in situ.

If your car is similar this may be the likely problem. Does your handbook advise?

My previous car was 13 years old when sold still on first battery, my Audi is now 11 years old and the same. I use a CTEK 5 also, but normally only boost charge/condition it sometimes a year.

Hope this helps.

Last edited by don0301 on Tue Dec 03, 2019 11:27 am; edited 1 time in total
 
  
View user's profile Send private message
   
40Anni996
Silverstone


Joined: 22 Apr 2009
Posts: 135



PostPosted: Tue Dec 03, 2019 11:16 am    Post subject: Reply with quote

Thanks don
I have no access to the handbook at the moment but will check it later
_________________
2004 996 C2 40th Anniversary

I have a keen eye for derail
 
  
View user's profile Send private message
   
moorhouse
Montreal


Joined: 15 Apr 2013
Posts: 521
Location: Northumberland


PostPosted: Tue Dec 03, 2019 11:20 am    Post subject: Reply with quote

40Anni996 - I have experienced very similar problems with a CTEK dropping out of its cycle and showing the error light on my 40th AE - initially it seemed fine but then started to go to about No 4 and then throw a wobbly. Tried it with both the cigarette lighter connection and direct to the battery and same issue. However the more clunky Halfords one is just fine (direct to battery terminals) and does the same smart charge job as far as I can see. The CTEK charger seems to work fine with my other older "classic" cars so don't think it's the CTEK charger itself - maybe there is something in the car circuit that the charger is sensing and throwing a fault. Not aware of any differences electrical wise between the 40th AE and the standard 996 though. Any electronics experts out there can probably advise. Also interested in any answer to the best connection to the negative side if not the terminal itself.
Cheers..Ian
_________________
40th Year Anniversary #698
 
  
View user's profile Send private message
   
Robertb
Dijon


Joined: 01 Sep 2003
Posts: 7333
Location: South Oxfordshire

2002 Porsche 996 Carrera 4S

PostPosted: Tue Dec 03, 2019 12:14 pm    Post subject: Reply with quote

No idea... but my battery is at least 5 yrs old, and has been kept on trickle charger through the lighter socket when in the garage and has shown no signs of letting go. Not a CTEK though, its an Airflow.

That said, I did have a battery go on a 4S a while ago which I used daily for long trips. Drove 90 mins to work, hopped into it at lunchtime, battery dead.
_________________
"911- the guilt-free supercar"

Current: 2003 C4S Coupe, seal/black

Ex: '02 C4S Coupe, '96 993 Targa, '88 Carrera Sport Coupe
 
  
View user's profile Send private message Send e-mail
   
40Anni996
Silverstone


Joined: 22 Apr 2009
Posts: 135



PostPosted: Tue Dec 03, 2019 12:17 pm    Post subject: Reply with quote

Thanks Ian, sounds like a very similar experience. I'll order a new battery anyway but think I'll try the CTEK one last time on this battery via an earthing point to see if it still throws a wobbly. I need to find a long term solution to keeping the new battery in good shape!
_________________
2004 996 C2 40th Anniversary

I have a keen eye for derail
 
  
View user's profile Send private message
   
chicb
Silverstone


Joined: 01 Jun 2017
Posts: 130



PostPosted: Tue Dec 03, 2019 12:20 pm    Post subject: Reply with quote

If your car has a battery management system ie stop/start, if connecting to the battery, only the pos+ should be connected & the neg- should be connected to a body earth ie a screw etc. Without stop/start, + & - are ok
If your battery has gone so low as you say you need to use an old fashioned charger to get the volts up as ctek will not bring back a dead battery, then connect ctek & it will then optimise the charge & care. My F type which only did 200miles this year has ctek on constantly & starts on the button.
Possibly you have a dead cell then its a new battery.
 
  
View user's profile Send private message
   
moorhouse
Montreal


Joined: 15 Apr 2013
Posts: 521
Location: Northumberland


PostPosted: Tue Dec 03, 2019 1:50 pm    Post subject: Reply with quote

40Anni996 wrote:
Thanks Ian, sounds like a very similar experience. I'll order a new battery anyway but think I'll try the CTEK one last time on this battery via an earthing point to see if it still throws a wobbly. I need to find a long term solution to keeping the new battery in good shape!


Like I said, I have been using a Halfords brand "smart" charger (which in principle seems to do pretty much the same as the CTEK type) until a couple of weeks ago - always went through the charge sequence fine and then sat as expected on the top up mode. Just changed recently to the one supplied with a Carcoon as I needed the Halfords one for another vehicle and the Carcoon one had been sitting in the box doing nowt. It seems to be working fine as well - again, it's classed as a "smart" charger so has a sequence of lights then a steady one when its in maintenance mode.

Still non the wiser why neither of my CTEK 5 chargers work on the 911 when they are absolutely fine with every other battery/vehicle I have. It's like something on the car circuitry stops it from going through the sequence.

Cheers...Ian
_________________
40th Year Anniversary #698
 
  
View user's profile Send private message
   
freshy
Silverstone


Joined: 13 Oct 2016
Posts: 106



PostPosted: Tue Dec 03, 2019 4:06 pm    Post subject: Reply with quote

Quote:
Still non the wiser why neither of my CTEK 5 chargers work on the 911 when they are absolutely fine with every other battery/vehicle I have. It's like something on the car circuitry stops it from going through the sequence.


You are not alone, I have exactly the same issue with CTEK 5 on my 911, when it is fine on other cars!

I would love to figure out why...
_________________
2005 996 'C4S Plus' Cab Manual in Atlas Grey X51
 
  
View user's profile Send private message
   
40Anni996
Silverstone


Joined: 22 Apr 2009
Posts: 135



PostPosted: Tue Dec 03, 2019 5:21 pm    Post subject: Reply with quote

Thanks freshy - tis odd indeed.

Any joy using another type of ('smart') charger/maintainer?
Thinking of pulling the trigger on a cheap Chinese one from Amazon to try instead of the CTEK.
_________________
2004 996 C2 40th Anniversary

I have a keen eye for derail
 
  
View user's profile Send private message
   
Hertsdriver
Nürburgring


Joined: 12 Nov 2018
Posts: 476
Location: Hertfordshire/London

2004 Porsche 997 Carrera 2

PostPosted: Tue Dec 03, 2019 5:24 pm    Post subject: Reply with quote

My Lidl £15 one is doing a great job so far...
_________________
My 997.1 C2 ownership thread: http://911uk.com/viewtopic.php?t=134228
 
  
View user's profile Send private message
   
alfazagato
Trainee


Joined: 03 Jul 2017
Posts: 83



PostPosted: Tue Dec 03, 2019 6:29 pm    Post subject: Reply with quote

I use a charger made by Granite Digital in CA. Save-a-battery is the trade name and it does just that.....highly recommended.
 
  
View user's profile Send private message
   
freshy
Silverstone


Joined: 13 Oct 2016
Posts: 106



PostPosted: Wed Dec 04, 2019 10:05 am    Post subject: Reply with quote

40Anni996 wrote:
Thanks freshy - tis odd indeed.

Any joy using another type of ('smart') charger/maintainer?
Thinking of pulling the trigger on a cheap Chinese one from Amazon to try instead of the CTEK.


I'm in a similar boat, just being more cautious before I buy another charger as thought I was buying the best when I bought the c-tek!

I'll update this thread before I buy something, maybe its a 996 MY04 thing? Question
_________________
2005 996 'C4S Plus' Cab Manual in Atlas Grey X51
 
  
View user's profile Send private message
   
40Anni996
Silverstone


Joined: 22 Apr 2009
Posts: 135



PostPosted: Wed Dec 04, 2019 11:12 am    Post subject: Reply with quote

Quote:
maybe its a 996 MY04 thing?


Or maybe it's an X51 thing?
_________________
2004 996 C2 40th Anniversary

I have a keen eye for derail
 
  
View user's profile Send private message
   
40Anni996
Silverstone


Joined: 22 Apr 2009
Posts: 135



PostPosted: Wed Dec 04, 2019 12:42 pm    Post subject: Reply with quote

don0301 wrote:
Hello

I have no experience with 911's BUT:

I have an Audi RS6 ("smart" battery in the boot) and this car must be charged (trickle charged) by terminals in the engine bay, not on the battery terminals. The reason given is the car "monitors" current use and therefore the battery must not be charged etc directly whilst in situ.

If your car is similar this may be the likely problem. Does your handbook advise?

My previous car was 13 years old when sold still on first battery, my Audi is now 11 years old and the same. I use a CTEK 5 also, but normally only boost charge/condition it sometimes a year.

Hope this helps.


Just checked the handbook and all it says about charging is to disconnect the battery cables first. This MAY be because of the reason you state for your Audi but it doesn't explicitly say why the advice is to remove the cables. Not really much help for constant trickle charging either Dont know
_________________
2004 996 C2 40th Anniversary

I have a keen eye for derail
 
  
View user's profile Send private message
   
moorhouse
Montreal


Joined: 15 Apr 2013
Posts: 521
Location: Northumberland


PostPosted: Wed Dec 04, 2019 12:56 pm    Post subject: Reply with quote

Nor does it explain why some chargers work (even when just connected to the in-situ battery terminals) while the CTEK doesn't. I've sent an e-mail to CTEK HQ with a link to this thread to see if they have any technical comments.
See what they come up with.
This is why I'm automatically suspicious of any car with more than 4 fuses and three wire colours.

Cheers..Ian
_________________
40th Year Anniversary #698
 
  
View user's profile Send private message
   
Giff
Monza


Joined: 28 Apr 2013
Posts: 211



PostPosted: Wed Dec 04, 2019 8:14 pm    Post subject: Reply with quote

The S5 refers to the warranty - 5yrs, Bosch S3 - 3yrs.

If its under 5yrs old and you can remember where you bought it..
_________________
997.2 C2
 
  
View user's profile Send private message
   
911UK
Porsche Community
Porsche Community


Joined: 15 May 2002
Posts: 10298
Location: 911UK

1997 Porsche 993 Carrera 2

PostPosted: Wed Dec 04, 2019 10:02 pm    Post subject: Reply with quote

freshy wrote:
Quote:
Still non the wiser why neither of my CTEK 5 chargers work on the 911 when they are absolutely fine with every other battery/vehicle I have. It's like something on the car circuitry stops it from going through the sequence.


You are not alone, I have exactly the same issue with CTEK 5 on my 911, when it is fine on other cars!

I would love to figure out why...


After 2 failed Porsche Ctek units in 8 years, have bought the Noco Gernius G7200 7.2 amp which I can't so far fault

also with it's AGM mode, good at charging the Cayenne's large stop/start battery

it's much larger but if I consider it's important, then it was about time for an upgrade




they also have the smaller NOCO Genius G3500UK 6V/12V 3.5 Amp charger


_________________
Get a Porsche Car Insurance Quote


FOLLOW 911UK ON TWITTER
 
  
View user's profile Send private message Send e-mail Visit poster's website
   
Display posts from previous:   
Post new topic   Reply to topic   All times are GMT - 12 Hours
Goto page 1, 2  Next
Page 1 of 2

 
Jump to:  

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You can attach files in this forum
You can download files in this forum
You cannot post calendar events in this forum