Features: Test all automotive cranking lead acid battery, including ordinary lead acid battery, AGM flat plate battery, AGM spiral battery, and Gel battery, etc. Directly detect bad cell battery. Polarity reverse connection protection, reverse connection will not damage the tester or affect the vehicle and battery. Directly test the battery with loss of electricity, no need to full charge before testing. Testing standards include currently the world\'s majority of battery standards, CCA, BCI, CA, MCA, JIS, DIN, IEC, EN, SAE.