Car repair and maintenance inspection tool kit brake fluid tyre tread gauge fault checking fine maintenance battery measurement Full protection function 1.Over voltage input protection 2.Anti-reverse voltage access 3. Poor contact tips Test Options Quick test: AH setting test Precise test: Starting current (CCA) setting test Test Function Battery test: Cold start current, battery internal resistance, voltage, life analysis Starting Test: Battery changes during system startup Charging system test: charging system work output status Maximum Load Test: Battery maximum load status