🔴 Car Battery Tester Review - No.1132

12V/24V Car Battery Tester Review

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Heathkit IT-12 Signal Tracer.

[VinceTomJones]

Thanks Mate good Video.. I bought one of these a couple of years ago.. just found it again... was in the boot of my car.. never used it but I will now after seeing your video...

[Chris_Grossman]

sae = society of automotive engineers
I was a member for a few years

[IanScottJohnston]

They don't test real CCA, they test internal resistance and calculate the CCA. Selecting a different amperage I guess changes the algorithm, I wonder if the manual/spec actually mentions this!
The old school testers did it for real.

[Roddders]

CCA: Cold Cranking Amps, specified by SAE & BCI, most frequently used value for starting battery at 0’F (-18’C)
IEC: Internal Electro Technical Commission Standard
SAE: Society of Automotive Engineers Standard
EN: European Automobile Industry Association Standard
DIN: German Auto Industry Committee Standard
CA: Cranking Amps Standard, effective starting current value at 0’C

[tomgeorge]

If you Google for a Ah to CCA converter, CCA = 7.25 x Ah.
So 120 x 7.25 = 870 if that can be believed.
Have you put an Amp Meter in series with the tester to see what it does?
I prefer the old load box with voltmeter and big load press button on top.
Load resistance is a coil of 8 gauge wire.

[Johadart]

Scott, did you miss the white cable on the plug inside, has a slice in it.. not sure if that will make it any better.. just seen it at the end of the video.. cheers mate 🤙🏼🇦🇺
Joe from Australia 🤙🏼🇦🇺

[EriksElectronicsWorkbench]

I'd be curious how accurate the internal resistance measurement was. If you take a reading for reference and then add a very low value resistor in series with one tester lead and take a second reading does the calculated resistance increase by the known added resistance? I'm a little skeptical of testers that don't really load down the battery with 10's or 100's of amps. But maybe it can make the calculations, it had more internally than I expected to see.

[TheEmbeddedHobbyist]

How can it possibly test and battery for something like CCA of 500 (Cold Cranking Amps) with two little resistors as a load?
Have you ever seen the old school battery testers that the garages used. Big slab of copper, two spikes to cut through the led oxide and crud on the terminals and a meter that measured the battery voltage when it's pulling a massive amount of current.

[robear]

In your second test on the first battery, when it gave you 100%, you didnt set the Battery type to AGM. You left it on STD type. Presuming this would have given the incorrect reading..

[fredflintstone]

Hmm I think I will stick with my top Don one it does cold cranking Amps, starter current etc I guess you get what you pay for