Funktionserklärung und Kaufberatung Batterieladegerät | Posts 24+

klahaui wrote:

Hey! Due to a lack of demand, I can only get it for €149 net. That wouldn't make sense. Regards

Hi!
Yes, that is correct. And then it still hasn't arrived for me.
And if I buy it privately, at least I have a 2-year warranty.

"Nevertheless, thank you for your effort!"

Hi!
Okay, the charger arrived today.
It's looking very good so far.
Nice storage bag, nice soft cables, excellent connectors with locking mechanism and rubber caps, and good cable strain reliefs.
Well, I'm already very excited about that.
Now, the instruction manual is being read, and tomorrow it will be tested!

I'm testing as well.

So far, I've been charging my Passat's battery (72Ah lead-acid, not AGM or anything like that) using the constant positive terminal of the trailer hitch wiring. So, there were constantly "fiddly" adjustments and modifications to the control units involved.

Now I've taken them out and put them in the basement... let's see how they start tomorrow.

The new 68Ah AGM battery he's currently using provides a really good amount of power. It starts perfectly even at -3°C.

m;

Hi!
Okay, so my 10-year-old 200Ah Berga battery in the tractor is as full as it's ever been, according to... Acidity.
The 45-year-old Polish diesel engine with a 3.2-liter displacement, which doesn't have a glow plug system, also starts in those temperatures.

The 10-year-old 140Ah Fiamm battery in the Multicar, however, appears to be dead, as the acid density is not correct.

Right now, it's my T4's turn, which is only driven occasionally.

But I'm telling you, -3°C isn't a problem for a TDI. My Golf starts right away even at -15°C, since I replaced the glow plugs, despite having 300,000 km on it.

Steffen G wrote:

Hi! The 10-year-old 140Ah Fiamm battery in the Multicar, however, appears to be dead, as the acid density is not correct.

Hmm, what can I say:

I still tried it again with the new charger, and it seems the 140 model is also saved! I charged it four weeks ago, set it to "recond", and the battery is working again.
I have started the Multicar several times over the past 4 weeks without needing to recharge it.
"That sounds good, thank you very much for the tip about a good charger."

It's very surprising that the Ctek gave your old, tired battery some life back! That's confirmation for me: I charged a 110Ah battery from a Mercedes E-Class for several days on "Recond" mode, and it's been working great as a caravan battery ever since. I thought it was just a coincidence before.

No, I don't believe in coincidences either. I replaced the 9-year-old battery in the C4, which repeatedly needed jump starts after winter, and it now works perfectly, bringing the car into a 'saleable' condition. Starting without any issues for 14 days in a row, even with short trips, speaks for itself.

Regards,
olli

Where did you end up ordering it from, and what was the price?

If you're talking about me: I got it from eBay, and it cost a good 120 euros including shipping.

Regards,
olli

No, I meant Steffen .
I wouldn't buy those kinds of products at the store because you can't tell if they contain cheap, low-quality goods from China.

Hi!
I also got it from eBay, and the price was about the same as Olli's.
I would say, if it's from a vendor that appears reputable and it's an immediate purchase option, then there's nothing against it. I haven't had any bad experiences with buying things on eBay either.

If you want to get it for 30 euros, the chances are quite slim.

I also asked around at the usual places, like the local tool suppliers and parts dealers, but it's always 30-40 euros more expensive there.
And I simply cannot agree with that, no matter how hard I try.

That's just the way things are these days.
For example, I went to the pharmacy today and bought a small bottle of skin cream. It costs €19.50 for 100 ml, nothing special. A completely normal, preservative-free, urea-containing facial cream.

I asked the pharmacist (or the manager) why it's so expensive. "I don't want to buy the whole pharmacy right away. "Well, the effort, the service, the excellent advice, blah blah."
"Then I'll say, I shouldn't be surprised if I get called twice a week to pick up two truckloads of packages from a mail-order pharmacy in Bad Steben, because they simply don't have enough trucks and drivers to handle it."
I didn't get a discount voucher for that phrase, but I just had to say it.
To buy a pharmacy in our town for €80,000 and then close it down, that's all it took.

***Warm-up***
Hi,
What are the cable gauges and lengths used in your CTEK chargers? I'm particularly interested in the CTEK MXS10, as there's a version with a 4-meter extension cable.
If the cross-sectional area is only 2.5 mm², the voltage drop across the cable and back is already 0.7 volts. The processor-controlled charging voltage becomes somewhat meaningless because of the voltage at the device's output, especially the charging termination voltage for an AGM battery.
On the other hand, it becomes somewhat impractical with a short 0.5-meter connecting cable.
Thanks & best regards.
Herbert.

I have a very old Ctek 4003, with a charging current of 4A.
The battery cables are actually only about 30cm long.
and approximately 1.5 mm² in cross-sectional area, but on the device itself, it is...
It has a secondary cable, approximately 3 meters long, leading to the plug.
for the battery cables.

If I'm already charging the battery, I'll program the processor.
to measure the voltage during the pulse pauses - then it matters.
The voltage drop is not a factor.

Best regards, gnash.

Thank you!

The 1.5 mm² cross-section seems to be the standard for all CTEK devices, including the MXS 10 EC, even with a 4-meter extension cable. Unfortunately, there is no information available in the technical specifications.
The PRO25S has an acceptable value of 5.3 mm² in its technical specifications. However, it does not have an increased short-circuit current for AGM batteries. The question is whether this increased voltage is actually needed for the given cable cross-section.

My impression is that the MXS devices up to model 10 are more suitable for battery maintenance and for motorcycles, but not for actually charging a large 90 Ah TDI battery. Even with the MXS10 version, the charging process takes too long. The constant current phase ends prematurely due to the voltage drop across the thin cable.
The competing products will likely be similar.

hg
Herbert.