Review on OBDResource 3in1 Auto Battery Tester: Professional Digital Alternator Analyzer for Cars, Motorcycles, Trucks - 6V 12V 24V, 100-2000 CCA by Alex Winnick

update: item no longer works! Send it back immediately. My car battery often dies because of the breathalyzer I have installed in my car. I bought it to check my battery level. The application was very simple and easy thanks to the clear instructions. So far I've used it once after removing the battery. I used the device for testing. My battery has a memory storage function, which is useful after removing the battery for repair. To remove a car battery, first remove the negative terminal and then the positive terminal. Make sure none of the wires are touching to avoid forensic shorts. After the test is complete, be sure to put the battery back in by connecting the positive cable first and then the negative cable. In general, everything went smoothly, and the quality and price of this product are satisfactory.