Feature:1. External Load Control: Obtain real time integrated discharge current capacity results by controlling load shutdown.2. Small Error: The highest battery capacity supports 9999AH (9999000MAH), the voltage and current measurement error is small.3. Automatic Identification: Automatically identify and develop the appropriate battery terminal voltage, and it can also be adjusted manually.4. Micro USB Interface: With a micro USB interface, the power supply voltage is DC4.5‑6V, which can be powered by various devices.5. For 12V Battery: The battery capacity meter has digital display and 3 control buttons, suitable for 12V 18650 acid battery capacity test.How to Use:1. The battery under test should be fully charged first.2. Connect the positive pole to the positive input, and connect the negative to the negative input. Do not reverse the connection (may damage the circuit). Connect the load to the positive and negative output, and power the tester micro USB (not available for desktop or laptop USB), and the battery voltage is displayed at this time.3. Press the OK button to start. Can automatically set a suitable termination voltage according to the full charge voltage of the battery, and it will flash and&nbs