1. No matter Lead-acid batteries, lithium batteries, water batteries, dry batteries. 2. All kinds of electric vehicle (12V to 99V) can be automatically identified and displayed in real time. 3. Through the voltage number to determine the fault of electric vehicle, twice the result with half the effort. 4. By turning the real-time voltage value can accurately determine the amount of remaining power, convenient for customers to drive. 5. The real-time voltage value can accurately judge whether the lithium battery is damaged.