Detailed parameters:

Power supply voltage: DC4.5-6V (micro USB interface)

Working current: not more than 70mA

Discharge voltage: 1.00V-15.00V resolution 0.01V

End voltage range: 0.5-11.0V

Support through current: no more than 3.000A resolution 0.001A

Voltage measurement error: less than 1% +0.02V

Current measurement error: less than 1.2%+-0.002A

Battery capacity range: 9999Ah(1Ah = 1000mAh) is switched by decimal point shift when the value is large, X.XXX when it is lower than 10Ah, XX.XX when it is above 10Ah, and so on.

Circuit board size: 50mmX37mm

Finished product size: 50 mmX37mmX 17mm (length X width X height, including copper foot height)

Weight of board and accessories: single board 28g (including copper pillar), two 5W ceramic resistors 9g,50W resistor about 27g (including wire)

Note: In order to improve the voltage measurement accuracy, this circuit has specially designed a DC bias. When the terminal is not connected to anything, a very small voltage will be displayed, which will not affect the actual measurement. If you short-circuit the input terminal (this time must be 0V), 0 will be displayed. If you want to understand the principle, you can consult the superposition theorem in electrotechnics.

Method of use:

1. The battery under test should be fully charged first.

2. Connect the positive pole of the tested battery to the positive input, and the negative pole to the negative input, and do not connect the reverse (the reverse connection with the load may damage the circuit)! Connect the load to the output positive pole and output negative pole, and turn on the working power of the tester micro USB (not available for desktop or notebook USB power supply), and the battery voltage is displayed at this time.

3. To start the test directly, you only need to press the "OK" button. The tester can automatically set the appropriate termination voltage according to the full charging voltage of the battery, and will flash for 3 times before starting the test. The termination voltage needs to be determined manually. Only press the "+" or "-" key to modify it in the battery voltage display state. The termination voltage is displayed at the beginning of P, followed by a voltage value with a resolution of 0.1V. After setting, press "OK" to start the test.

4. After the test starts, the tester will turn on the electronic switch that controls the load, and the test process data display will turn on the discharge capacity (Ah), the current discharge current (A) and the battery voltage (V). When the battery voltage reaches the set termination voltage, the tester cuts off the load control switch, and the displayed data stays on the capacity (Ah) and flashes quickly together with the corresponding indicator light. At this time, the displayed capacity is the actual discharge capacity of the battery. Press "OK" to stop the flashing and let the data display stably. Press the "OK" key again to return to the just-on state and replace the 1 battery under test......

Error code and meaning:

Err1: Battery voltage above 15V

Err2: The battery voltage is lower than the set termination voltage

Err3: The battery cannot withstand the load discharge current or the internal resistance of the line is too large

Err4: Excessive current (current exceeds 3.1A)

Err5: Improper use or wiring error has caused the device to burn out and cannot be used (current sampling or control switch MOS burned)

Note: If the battery is connected reversely, the circuit switch tube may be damaged when the load is connected and the load current is large (about> 0.8A)!!