Safe rounding of CCA during battery load testing

Question

How do you determine the safe amp load of a battery tester?

I am looking at testing a battery on a 2012 Mazda 3 sport which has a Mazda factory battery 75D23L (52).

The service manual states in the testing procedure that the Battery load test current should be 195 A.

I have a budget load tester which does increments of 100 A. It states in the operating instructions: "Round the battery number down to the nearest 100".

Now my gut says 195A is close enough to 200A, but what if...

If I drop the 100A, then the test seems like it would be no good. It would only be testing half the draw and may falsely pass.

200A is only about 2.6% higher than 195A. Would 3% over be too much?

cano · Answer

I think that will be fine. Don't know what type of tester you have. If after the test it will give you a rating or just a pass/fail. But if its the original battery you may be at the end of its life. Especially if it's starting to give you problems.

Answered by cano on August 19, 2021

Safe rounding of CCA during battery load testing

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