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Tool Talk Discussion Forum

Re: Plan B Load tester?

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Author  [Modern View]

12-22-2012 15:26:21

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I have a Sun that was used to check the bats on the mayflower Paid $5 for it at a auction,,, it will bring a bat to its knees,,, I also have a Christye somewhere in the old shop paid $450 for it,,, parked it after I got the Sun... Both will load at least 500amps 8) ... In my opinion you need to have the capability to load at least 500 amps to cover most of whats out their....

My general rule on most common fully charged auto battery's...

load 200 amps for 15 sec. if the bat voltage stays above 9.6V its very good,,, you are good to go, life's good...

If it falls between 9.1 and 9.5 its worn but useable don't hesitate to replace it if you feel the starters not cranking as it should... If it makes you feel good replace it you are ruining on borrowed time...

Anything under 9V the bats history...

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12-22-2012 20:24:12

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 Re: Plan B Load tester? in reply to Hobo,NC, 12-22-2012 15:26:21  
Hello Hobo,NC

Sounds like you have done some testing.
Testing a battery with a load tester though is done at 1/2 its rated CCA.
The 15 sec, and 9.6 volts are the correct values as you stated.


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