DUOYI DY2015C Car 12V 24V Battery Tester 1. Storage battery tester is used for activated style lead-acid storage battery, along with checking battery life time and the following conditions of the battery, starting up, charging, and electrical loading. 2. With great design, easy operation, precise reading, complete functions, this tester supply the readings by a large LCD and hints by sound and light when testing. Precise circuit and strong digital processing unit make it complete collection of a series of complicated data and figure out every test data. 3. Storage battery tester strengthens input protection inside, in order to prevent such situations as polar reversal connection, over-high voltage input, poor contact of the test clamps and so on. That makes sure safer and more convenient when testing. 4. Integrated printer allow us print test result easily. 5. Storage battery tester fit for all kinds of lead-acid batteries that used in equipment system associated with lead-acid battery. It is available to vehicle of 12V storage battery. The working voltage of tester is DC 9V to 35V. Do please do not check the series connection battery with the tester. 6. 12V system test voltage:DC 9-18V 7. 24V system test voltage:DC 9-35V 8. Battery internal resistance: 0-99m Ohm 9. Battery status of health: 0-100% 10. Operation language: English only