Just seen a video about testing car batteries and the tech was demonstrating that while a load tester showed the battery was producing the amps it was rated for with good voltage the battery failed the conductance test with a conductance tester. The conductance tester showed good voltage but it showed a lot less cranking amps then the battery was rated for and showed it as a fail. The conductance tester resembles the size of a small hand held code scanner and looks pretty easy to use. Can someone educate as to how the conductance tester measures the amperage of a battery and how it can produce different results than a load tester wich seems to act like a big resistor similar to what a starter would have. Also what tester would be more accurate in showing the batterys true capacity? The video is how to tell if your car battery is really bad with kent bergsma battery clinic pt 3