DY2015C Automotive Battery Tester With Printer 12V & 24V Voltage Battery Analyzer For Battery Status, Engine Activtion System, Charging System, Maximum Work Loading Available for both 12V and 24V automotive battery with heavy duty carrying case. Battery test: cold cranking amps, battery resistance, voltage, life analysis. Start-up system test: the change of battery system with the process of startup. Charging system test: the charging system working state of the output. Maximum load system test: the maximum load state of battery.