Ok toolmanmike, you know I can’t resist this. I agree about Snap-On tools losing some of their quality, however, a couple of comments. As TMM asked, was it a 100A toaster-type tester? One previous comment stated that a battery tester doesn’t put the same load on a battery as a starter. A good one can, however. I’m going in the “way-back machine” of my memory here, but, according to my often inaccurate memory, the old Snap-On MT540 had a 500A load pile (Sun’s competing VAT-40 had a 400A pile). The testing protocol for a battery was three times the Amp-hour rating (remember that?) for 15 seconds, at the end of which the battery voltage should not have dropped below 11.5V. Needless to say, shops with a large-pile load tester sold a lot of batteries back in the day. Disclaimer: I was a Snap-On dealer from 1978-1985, shortly after the invention of fire and the wheel.
