Tester Operation GuideI. Operation Guide 1. Power Connection & Startup Connect the DC power supply or AC power cord to the rear of the tester, then turn on the device — the LCD screen will light up. 2. Test Line & Communication Line Connection Connect the test lines and communication line to the front of the tester (the communication line is unnecessary if not using computer software). Generally, the following cables will be used during the test: • Crocodile Clip Cable: For testing batteries with tabs. • 4-Wire Battery Holder: For cylindrical batteries. • USB Male Cable: For testing power banks or power supplies. To ensure sampling accuracy, the test clip cables adopt a 4-wire system: • Red wire: Connect to the positive pole of the battery. • Black wire: Connect to the negative pole of the battery. • Thick wires: Current collection lines (A+, A-). • Thin wires: Voltage collection lines (V+, V-). Testing cannot be performed if only thick wires or only thin wires are connected. 3. Connect the Device Under Test Connect the battery or power supply to be tested to the front of the tester, and the current voltage will be displayed on the tester's LCD screen. 4. Parameter Settings Long-press the SET key/knob to enter the settings interface, and set the test parameters via the keys or knob. When connected to a computer, the keys and knob will be disabled, and settings can be directly made through the computer-side software. 5. Battery Capacity Testing To accurately measure the battery capacity, it is generally necessary to perform a constant-current discharge test on a fully charged battery. Set the discharge current and cut-off voltage to start discharging, and the final capacity will be displayed on the LCD screen. The same applies to the capacity test of power banks; refer to the "Frequently Asked Questions (FAQ)" section for specific parameter settings. 6. Power Bank & Power Supply Current Testing Current testing of power banks or power supplies is also performed via constant-current discharge. The discharge current can be set to the maximum output value of the power bank or slightly lower, and the cut-off voltage should be set below 4V. It should be specially noted that the cut-off voltage refers to the voltage at which the test stops, not the output voltage of the power bank — the tester uses the set cut-off voltage to determine when to stop the test. First, set a small current to start discharging; after startup, the current can be gradually increased via the keys/knob or software. When the current is adjusted to a certain value and the power bank turns off its output, the maximum value is measured. 7. Start the Test & View Results After completing the settings, the specific test can be carried out. After the test, the results will be displayed on the LCD screen or software. It should be specially noted that if the test is started via software, if the software communication is disconnected during the test, the software will not collect any data after the disconnection, and only the data displayed on the LCD screen can be viewed after the test is completed. 8. Post-Test Shutdown Strictly follow the steps: first remove the tested battery or power supply, then turn off or disconnect the power supply of the tester.
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