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Tool Talk Discussion Forum

Re: Batteries Plus vs. Harbor Freight Battery Load Testers

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George Marsh

04-11-2013 13:24:03

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Think about it, let"s say you have a large 900 cca battery. What good is it to put 100 amp load on it? It really doesn"t tell you much. The 100 amp load tester may tell you the battery is good and a week later it"s not. That"s just my experience with a 100a HF tester. Yes, the 100a load tester will tell you if the battery is junk. So will putting it on a starter and it won"t start.

What it won"t tell you is the 900 cca battery is only putting out 450 cca.


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Glenn F.

04-11-2013 13:33:43

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 Re: Batteries Plus vs. Harbor Freight Battery Load Testers in reply to George Marsh, 04-11-2013 13:24:03  
Well said. What really then is the purpose for a 100 amp automotove battery load tester?


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04-11-2013 14:12:37

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 Re: Batteries Plus vs. Harbor Freight Battery Load Testers in reply to Glenn F., 04-11-2013 13:33:43  
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Glen, First, the purpose of the batt load tester is to give you a quick idea of the condition of the battery (without having to connect it to a starter) not to perform a full load test. All you are looking for is 'will the battery start the engine as required'. It is usually used as a bench test tool before and/or after battery maintenence. Generally speaking, the tester performs a load at 50% of the needed amperage. I have used one for over 35 years (which I still have) and the tester has never failed to indicate a ballpark state of the condition of the battery. A very useful tool.

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George Marsh

04-11-2013 14:13:12

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 Re: Batteries Plus vs. Harbor Freight Battery Load Testers in reply to Glenn F., 04-11-2013 13:33:43  
Glenn, What are they worth, about $30 at HF. They are a good 12v analog voltmeter.

Like I said below, I went with a battery conductivity tester. That what they use at a car dealer. Load testers are a thing of the past.

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