The quality of the tests is questionable. I've tested the battery several times and said it's excellent. I used a different tester because I knew the battery wasn't the best and failed the test. The voltage graph is nice to observe the generator output with a max-min display. NOTE: This is not a wave chart. Result ranges: excellent, normal, poor, replace. I wish it was called "good", "recharge", "bad cell" and "spare". The cable length is the same as most testers in this price range. It only reaches the support tower. Sometimes caretaker. I expected that, so I'm not complaining. The screen size and color is pleasing but easy to manage with the alternator added manually and the starter check works well. If you mainly use it to test batteries, you can guess if you think the results are achievements.
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