Car Battery Tester 12V High Efficiency Automotive Battery Checker Cranking Charging Test Tool Item Type: Car Battery Tester Material: ABS Three Functions Tester: Step 1. Connect the 12V battery, red clips to positive pole and black clips to negative pole. Step 2. Battery Test: Firstly select the type of battery to be tested, then the test criteria and the test range, and then you have the results within few seconds. Step 3. Cranking Test: After selecting the cranking test function, follow the prompts to start the engine. Test completed. Step 4. Charging Test: After entering the charging test function, follow the prompt to increase the speed to 2500 RPM for 5 seconds, then press OK. Test completed. Description: BT360 Car Battery Load Tester is dedicatedly developed to test 12V regular flooded, automotive batteries, AGM flat plate, AGM spiral, GEL, and EFB batteries. with a quick, simple and cost effective solution to know the battery's charging status better, check the battery's health and detect faults.