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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: 4374
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: 15
Joined: Fri Aug 24, 2018 12:30 am
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
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