74Ah 680A Battery: Decreased Starting Current (650A to 530A) – Causes, Restoration, & Expectations

Question

Hello! A month ago I bought a new 74Ah and 680A battery. After the purchase, I measured the starting current - the result is 650A, the steel in the warehouse may have lost a little ... Now when I measured the result was at 530A Could the value of this starting current be caused by something...

niutat · Answer

Hello.
Cranking current depends on battery charge level and temperature.
Quote:
" The second important feature is the starting capacity. It is expressed in the discharge current specified by the manufacturer that the battery can deliver at minus 18 degrees in 60 seconds to obtain a voltage of 8.4 V. The high starting current is especially appreciated in winter, when the starter draws a current of about 200-300 amperes. The value of the starting current can be measured according to German DIN or American SAE standards. These standards provide for different measurement conditions and, for example, for a battery with a capacity of 55 Ah, the starting current according to DIN is 266 A, and according to the American standard as much as 423 A. "
And here's a bit about that;
https://www.elektroda.pl/rtvforum/topic468588.html

forestx · Answer

How are you measuring the inrush current?
How often do you measure the inrush current?
I suspect what does the most damage to your battery... measuring the cranking current frequently :twisted:

The battery (every one) ages and, among other things, the starting current drops - until it is finally unable to spin the engine.
What can you do about it? Absolutely nothing. So give him a break.

luckyboy · Answer

I use a special Banner brand device to measure the inrush current: before the measurement, you enter the data (Ah A and temp.), and I measured twice after the purchase and yesterday :) If my battery, as you say, is aging at the rate of 1/6 of the nominal current per month, then in 2-3 months it will be suitable for the trash, so I believe that this is not normal and you should not let it rest

bati1986 · Answer

you should drive it for a while and then check it. Anyway, if it fires, there's nothing to think about it for now.

Darrieus · Answer

You kill him yourself and you blame the hunchback for having simple children

The starter will never draw 600A... draws 100-150A.....
Starting current below 70% of the factory value can only worry, not such changes. Apart from that measurement conditions!!!! or a battery from a store shelf? after the car has been parked for a long time? after one night? after a week of standing? after a long journey? I do not mention the temperature, a change of 5 degrees will significantly change the result, so instead of looking for problems, wash the car

luckyboy · Answer

Thanks for the factual answer And I'm already washing the car

nasu · Answer

Old topic, but problem not solved. I have a similar case. Battery manufactured April 2019, purchased July 24, 2019 Autopart 110Aha 950A EN Measurement with a fully charged tester shows 910A at 20°C. make a complaint?

kortyleski · Answer

This tester does not load the battery with such current. It simply measures the Rw of the battery and on this basis calculates the maximum current. With this method of measurement, 10-15% error is normal.

nasu · Answer

Maybe so, but I use a total of 9 batteries in various vehicles and machines, and even a few-year-old no-name batteries have a higher current than declared when measuring with a tester. At temperatures above +20C, the EN current should be much higher.

The previous Autopart 110 G+ worked flawlessly for almost 8 years and was replaced with the same one.

September 14, 940A

74Ah 680A Battery: Decreased Starting Current (650A to 530A) – Causes, Restoration, & Expectations

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