12V battery tester digital for AGM cars high accuracy spiral type1、High Accuracy: The car battery tester adopts high accuracy amplifier and calibrated by professional battery testing tool, can provide accurate test results, and the reading accuracy up to 99%. 2、Applicable Battery Type: The battery checker can test all automotive cranking battery, including ordinary battery, AGM flat plate battery, AGM spiral battery, Gel battery, and so on. 3、Testing Standards: The Battery load tester can test with the the major battery standards around the world at present, for example, CCA, BCI, CA, MCA, JIS, DIN, IEC, EN, SAE, GB. 4、Test 12V Batteries: Starting (SLI), Deep Cycled and Marine of Wet (Flooded), VRLA or Maintenance Free (MF), Sealed Maintenance Free (SMF), Absorption Glass Mat (AGM) and GEL EPB cell. 5、Safe to Use: Reverse connection will not damage the tester or affect the vehicle and battery thanks to polarity reverse connection protection. You can directly test a dead battery without full charging before testing.