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Battery troubles

Stephenjk

Stephenjk

PCGB Member
I'm having issues with my battery ATM. Battery is less than 4 years old. I keep it on a ctex charger and I have the ctek wireless monitor too.

What I find is ctek charger doesn't maintain a charge and isn't charging to full, per the pics below.

I'm assuming issue is either
Battery
Ctek charger
Connection issue

I've checked connections all fine. I've a cheap battery checker and that says battery is fine. Any ideas of what else I can check?










 
Interesting. I have two CTEK's on the go with both batteries @ 7 years old. No problem and both show fully charged (multimer test).

Have you tested the battery charge separately with a multimeter (no ignition on) then again with the engine running and all electrics on (heater, light full beam etc) for a constant charge reading? Might give you the overall idea of your battery condition - unless you bought a £50 special offer ;)

To rule out the CTEK can you connect to another battery (other vehicle) and leave overnight and see what the reading is then? If that's all good (full charge indication) then maybe the issue is the battery has just had enough. Maybe try a friends CTEK and see if you get the same reading.
 
Does the car still turn over full beans? You think you have a drain/leak somewhere?
 

Thanks, I've been relying on the charge reading from the ctek wireless charger but I'll try with multimeter and will see what it looks like off and then with car running and lights etc on.

Battery was around £100 it is the bosch s5 silver so wasn't cheap.

You are right on the drain, I've been meaning to look into that but not got around to it. i also think I have something odd with the BOVEE1000 attached to the ipod connection on my becker grand prix. It seems to be live intermittently as sometimes I find my phone pairing with my car when the car has been off for a day.

I don't know anyone nearby with a CTEK but will ask around!

thanks for advice I'll let you know how I get on.
 
I have a numerious CTEK's chargeing different batterys and the one on the 964 Porsche also has the CTEK Wireless monitor .

Looking at yours I would say your battery is either not able to be charged, or your charger is faulty and not charging.
My monitor reports 100%, and even when I had a weak battery it still reported 100% but wouldn't hold the charge long.

Can you try a different charger, or try charging another battery to check the charger?
 
Put multimeter on battery it is 12.29v while ‘on charge’ have another ctek coming so going to check if the charger is the issue.
 
ideally should be @ 12.6v or a tad more. 12.4 is borderline and 11.9 maybe difficult to turn the engine.

Battery manufactures usually apply the rule if the battery has been deep cycling over 50% depth of discharge then it's pretty much unrecoverable and done. That is the (car) battery allowed to go completely dead, kaput between full charges. A car battery shouldn't really loose anything more than 20% of it's charge during its life apparently. Assuming though you've never allowed your battery to go repeatedly flat between charges. Deep cycle batteries (which can look the same and not necessarily advertised as such) are made to completely deplete between charges (typically leisure/caravan etc batteries).
 
Problem was the charger, a new ctek is maintaining charge fine. You can see that from the diagram below when I connected the new charger last night. Hopefully old one we get repaired as it is still in warranty. I used all same cables to connect so only difference is the charger.


 
Interesting. Glad you tracked the fault down. Hopefully any CTEK failure or malfunction results in a -ve low charge state reading and not the opposite :)
 
Yes that appears to be the case for me. Interesting it was charger you tend to think it is battery that is the unreliable component.
 
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