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?

  • 1
    Are you trying to diagnose a problem? I frankly wouldn't bother with a load test if there are no indications (slow cranking, etc). Cheap load testors are simply not that accurate.
    – agentp
    Nov 17, 2017 at 13:24
  • It would be very helpful if you could link the tester you’re using... without that information it’s hard to give a valid answer. Nov 17, 2017 at 17:59

1 Answer 1


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.

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