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CTECK battery charger.

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ron
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CTECK battery charger.

Post by ron » Sun Apr 14, 2019 8:11 am

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I've got a couple of these chargers which have been on vehicles in storage over the winter. I thought this charger could be left on constantly to keep the battery in great condition. However, when I came to start the cars both batteries were flat!!

These batteries will no longer take a charge of any sort.

Has anyone had the same problem with these chargers or have I done something wrong?

Have sent email to CTEK in Sweden ref this problem and awaiting reply.
They are ALWAYS rustier than you thought!!!!!!
'85 M #228
'87 M #367
'88 High line.
'80 735i

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jps635
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Re: CTECK battery charger.

Post by jps635 » Sun Apr 14, 2019 9:10 am

Hi Ron

I use the same charger all year round and haven't experienced any problems.
'85 635csi JPS (RA2-66)

Ronnie Wilson
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Re: CTECK battery charger.

Post by Ronnie Wilson » Sun Apr 14, 2019 12:21 pm

Hi Ron,

I have one of these Chargers and it says before you connect it to the Battery it should be turned on. I have a permanent connection to the Battery so i can just plug it straight into the Charger.
Ronnie
Liverpool uk.
1986 635csi

ron
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Re: CTEK battery charger.

Post by ron » Sun Apr 14, 2019 1:41 pm

Thanks for the reply Chris. Have you left the charger connected and switched on all the time?

I had one connected to a car in my garage which was fine for a couple of years but when I tried starting it about a month ago, the battery was flat.

So I've now had 3 units that have played up.

Be interesting to see what CTEK says.
They are ALWAYS rustier than you thought!!!!!!
'85 M #228
'87 M #367
'88 High line.
'80 735i

ron
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Posts: 4400
Joined: Sat Jul 10, 2004 11:35 am
Location: South Wales U.K.

Re: CTECK battery charger.

Post by ron » Sun Apr 14, 2019 1:43 pm

Ronnie Wilson wrote:
Sun Apr 14, 2019 12:21 pm
Hi Ron,I have one of these Chargers and it says before you connect it to the Battery it should be turned on. I have a permanent connection to the Battery so i can just plug it straight into the Charger.
How long have you had it connected Ronnie?
They are ALWAYS rustier than you thought!!!!!!
'85 M #228
'87 M #367
'88 High line.
'80 735i

K1W1
Posts: 28
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Location: Auckland New Zealand

Re: CTECK battery charger.

Post by K1W1 » Sun Apr 14, 2019 3:39 pm

Hi i have 4 cars that are hooked up to ctek chargers, the longest for +10 years. Newest prob 3-4 years.
One charger gave up the ghost about a year ago but otherwise they have been fine.
Never worried about turn on or off order etc

Ronnie Wilson
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Re: CTECK battery charger.

Post by Ronnie Wilson » Mon Apr 15, 2019 4:18 pm

Hi Ron,

My Cteck has been on constantly for 3 years now.
Ronnie
Liverpool uk.
1986 635csi

Tommys 89 635
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Re: CTECK battery charger.

Post by Tommys 89 635 » Mon Apr 15, 2019 4:48 pm

I normally disconnect the battery but I do connect the trickle charger on every other month or so to make sure the battery is fully charged.

I've got an older BMW charger, which is no longer sold.

https://www.bmwblog.com/2014/03/03/bmw- ... ng-system/

The newer ones look much different.

https://www.shopbmwusa.com/ACCESSORIES/ ... Y-TENDERS/
Tommy
1989 635 CSI (Second owner since 1995, driven daily and retired in 2013 to occasional driving)
2011 335D

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jps635
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Re: CTECK battery charger.

Post by jps635 » Thu Apr 18, 2019 8:26 am

Hi Ron

I run the car all year round so just plug in between runs.

As an aside I connect a much more basic unit to an 800ccA marine battery for 6 months or so every year without use that trickles out a constant 1 amp (no smarts), which I replace every 4-5 years although always in good nick, even though these batteries get a hard life.
'85 635csi JPS (RA2-66)

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sansouci
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Re: CTECK battery charger.

Post by sansouci » Thu Apr 18, 2019 10:47 am

Ron,
I've used the 3300 model this past winter and I topped off the water in the cells before going into storage. Have you tested the charger output with a multimeter?
Sansouci
84 E24 633Csi Auto, Bronzit/PearlBeige 6997510
93 E32 740il M60 Auto, Alpenweis/Ultramarine
60 528i M30 5-speed Green/Beige (crushed)
71 240Z 4-speed White/Blue (rusty & sold)
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sharkfan
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Re: CTECK battery charger.

Post by sharkfan » Wed May 15, 2019 6:31 am

I know it doesn't help Ron's problem with his CTEK but there are alternatives; I have used Accumate charger/maintainers for 20 years now with never a problem - no need to to turn it on, no modes to check or select, just plug and play and walk away.
2001 Alpina B10 V8 Touring (1 of 12 rhd)
1997 Alpina B12 5.7 L (1 of 2 rhd)
1995 Alpina B10 4.6 Touring (1 of 1 rhd)
1985 BMW M635CSi (1 of 524 rhd)
1982 BMW 635CSiA (1 of 100's left from the 1000's made and still valiantly fighting against a rusty grave)

Jambers
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Location: East Midlands UK

Re: CTECK battery charger.

Post by Jambers » Wed Jul 03, 2019 8:48 pm

Ron, was yours one from eBay or Amazon? I have found 2 dud's (one from eBay and one from Amazon. I suspect they were cheap because of a faulty batch, or they were extremely good knock off replicas!! I have 2 from Halfords and they work faultlessly.
1989 635CSi Manual
2007 Z4M Coupe
Based in the U.K. Leicestershire

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