KONNWEI KW720 Car 3.2 inch 6V-24V Lead-acid Battery Tester with Printer 1. It can check the overall operating status of 6V 12V 24V battery. Battery testing can analyze the battery healthy status to calculate the actual cold cranking capability of the battery and the aging extent. Cranking test helps you test and analyze the starting motor, and the charging test is to check the charging system status to avoid damaging the battery. 2. The battery tester built in printer, equipped with standard thermal printer paper,can print the last test result of this battery tester directly. After the test is completed, you can easily print the test results, then paste it on the worksheet.Support the majority of vehicle battery standards, such as CCA, BCI,CA,MCA,JIS,DIN,IECENSAE,Suitable for all 1V -30V lead-acid batteries ranging from 100 to 2000 CCA, including regular flooded, AGM flat plate, AGM spiral, GEL, and EFB batteries for the truck, boat, Car, motorcycles, lawn mowers and other gardening machines,etc. 3. This car battery load tester offers vehicle electrical safety through exceptionally polarity reverses connection protection. Fully Insulated Alligator Clips are built with user safety in mind through spark-free operation and reverse polarity protection. 4. It is easy-to-use and can get accurate results in seconds. The battery alternator tester can directly detect bad cell battery and test the battery that is losing power (as low as 1.0V), no need to full charge before testing. 5. Languages: Chinese, English, German, French, Japanese, Korean, Dutch, Russian, Spanish, Italian, Portuguese, Polish, Persian 6. System Voltage: 6-36Volts 7. Measure Standard: CCA:100-2000 BCI:100-2000 CA:100-2000 MCA:100-2000 JIS:26A17-24SH52 DIN:100-1400 IEC:100-1400 EN:100-2000 SAE:100-2000 8. Power supply: 3.7V lithium battery, 2000MA x 2