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100 Amp, 6/12V Battery Load Tester

100 Amp, 6/12V Battery Load Tester

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$20 USD on Harbor Freight Tools
Fast and easy to use, this battery load tester checks your vehicle's charging system under working conditions. This load tester takes the guesswork out of electrical diagnosis, making it easy to pinpoint charging system failures. Test complete charging system including alternator, regulator, and battery. Also tests starter motor for excessive draw. For use with 6 volt or 12 volt systems Color-coded voltage meter for easy reading Heavy duty steel case with enamel finish Vinyl dipped steel clamps with copper plated jaws Heavy duty CCA wire

Forum Discussions about this Product

1 - 3 of 3 Posts
  1. B

    Van not starting at all not sure of the cause

    2
    35
    4K
     by Bry4hunting
    1. Motor7

      · Premium Member
      2021 3500 Extended
      Joined
      ·
      850 Posts
      #25 ·
      Have you load tested the battery yet? A static voltage reading can indicate a problem, but it may not indicate a bad cell that instantly fails under load. Jump it and drive it to Autozone/Oreillys/Advance for a free load test, or drop by HF and buy one:
      www.harborfreight.com

      100 Amp, 6/12V Battery Load Tester

      Amazing deals on this 100 Amp 6/12V Battery Load Tester at Harbor Freight. Quality tools & low prices.
      www.harborfreight.com www.harborfreight.com

      $20 well spent.....
       
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    2. B

      · Registered
      2015 Ram 2500 Promaster Diesel
      Joined
      ·
      38 Posts
      Discussion Starter · #27 ·
      Motor7 said:
      Have you load tested the battery yet? A static voltage reading can indicate a problem, but it may not indicate a bad cell that instantly fails under load. Jump it and drive it to Autozone/Oreillys/Advance for a free load test, or drop by HF and buy one:
      www.harborfreight.com

      100 Amp, 6/12V Battery Load Tester

      Amazing deals on this 100 Amp 6/12V Battery Load Tester at Harbor Freight. Quality tools & low prices.
      www.harborfreight.com www.harborfreight.com

      $20 well spent.....
      Click to expand...
      I will try that wasn't sure if I would make it there. I will give that a shot also. I believe they rent those testers so I can do that also possibly. Thanks
       
  2. steamdoctor313

    2022 Promaster 2500 TROUBLE

    7 8 9
    160
    7K
     by steamdoctor313
    1. diytech

      · Registered
      Joined
      ·
      644 Posts
      #84 · (Edited)
      A sulphated battery can appear to charge and even reach fully charged potential while charging, thus indicating 100% charged at some point, and even triggering maintenance mode on smart chargers. In order to really measure the true charge state of a lead acid battery (flooded or otherwise), a load has to be applied while voltage is measured. One of these will do the trick nicely: Tester


      And if a battery really must be relied upon (i.e. you can't afford to be stranded by an old battery on a trip), then measure the specific gravity of the electrolyte in each and every cell with one of these: Battery Hydrometer
       
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