The features include Battery test, Cranking test, Charging test, Maximum load test and reverse power connection protection. 【12V & 24V BATTERY LOAD TESTER】ANCEL BST600 automotive battery tester works on 12 volt & 24 volt lead-acid batteries including regular flooded, AGM flat plate, AGM spiral, GEL and EFB batteries with the test range (100-2000 CCA).