Reasons to choose Professional car battery tester ANCEL BA301 1. Support test wide range of 6V/12V batteries. 2. Simple and easy to use 3. Test batteries IN/ OUT of the vehicle 4. Accurate results in milliseconds 5. Battery life analysis, health percentage 6. Analysis Result: Good, Recharge or Replace 7. Lifetime update free and print via PC. 8. Add One-key entering battery voltage waveform analysis 9. 3 LED indicators directly tells you what happened to your battery 10. High quality imported STM-32 103VCT6 Chip Set, Faster running speed. BA301 functions and features: 1.System voltage: 6-12 Volts 2.Test Result: Good, Recharge or Replace 3.Capacity - Cold Cranking Amps (CCA), DIN, EN and IEC information relative to battery rating. 4.Internal resistance value (mΩ) 5.Life in percentage (%) 6.Cranking system 7.Charging system 8.Voltage test in waveform 9.Record and re-play battery data, Life-time free update service 10.Battery test, cranking test, charging test and other additional functions. Cranking Test The cranking test is used to test and analyze the actual required cranking current and cranking voltage to check the starting motor works properly or not. The test result displays cranking time, voltage, and status. If the stating malfunction may cause an increased starting loaded torque; or rotor friction of the starting motor generates increasing friction of the starting motor itself. Charging Test Charging test is used to check and analyze the charging system (generator, rectifier, rectifier diode, etc.) status, displays load voltage, unloaded voltage, ripple status, charging system status, thus to find out whether the output voltage of the generator is normal, the rectifier diode works properly or not, which avoids damaging the battery and shortening its life greatly due to overcharging or incomplete charging. Monitor Real-time Voltage BA301 battery tester can monitors real-time voltage to check battery health status. There's a hot-key to directly one-click read the voltage change graph. The waveform displays current voltage, maximum, and minimum voltage during ignition, and it will stay static until there are voltage changes detected. By analyzing the voltage of discharge, starting, and charging to know if the battery needs to be replaced or not. ANCEL BA301 Car Battery Tester Supported Language: Chinese, English, German, French, Japanese, Korean, Dutch, Russian, Spanish, Italian, Portuguese, Polish Update Function: Click Enter button before u plug cable with PC or laptop, then u see the screen enter into "update mode", it means it come into update page successfully. BA301 Cover 9 Measure Standards: 1.CCA:100-2000 2.BCI:100-2000 3.CA:100-2000 4.MCA:100-2000 5.JIS:26A17-24SH52 6.DIN:100-1400 7.IEC:100-1400 8.EN:100-2000 9SAE:100-2000 Package included: ANCEL BA301*1 USB Cable*1 Nylon bag*1 Quick Manual*1 Paper Box*1