Argus AA400 Professional Digital Battery Tester and System Analyzer Complete battery capacity and battery cranking performance tests performed - starting and charging systems also tested Clear, intuitive graphical display - quick, at-a-glance understanding of key battery health characteristics Tests all battery styles from 30-2000CCA - Wet, Flooded, Maintenance Free, Gel, AGM, and Spiral styles Quick, easy 10 second test - test more batteries - sell more batteries 3 year warranty - Argus will repair or replace (at our option) defective product within the warranty period.