Review on AUTOOL 20 3000 Cranking Charging Diagnostic by Kevin Carr

I have been using name brand battery testers for over 3 decades. Aside from the ridiculously high purchase prices, I never thought about it. They just work. But this AUTOOL tester changed everything! Accurate readings, no tricks to get those readings (e.g. headlights on, engine RPM, etc) and it reads the actual load on the amp. And it's all easy to print! Comes with 2 rolls of paper. For less than $110! This is the tester you need to buy. You have made your purchases. Click on "Add to Cart".