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.