Review on 🔌 MakerHawk USB Load Tester: 150W 200V 20A Resistor, Adjustable Constant Current Battery Capacity Module. Intelligent Discharge Resistance Power Tester by Flavio Iyer

Supplied in a vacuum formed plastic sleeve in a well protected carton. I use the packaging to store it when not in use as it is a bare PCB with no case and the cooling fins are very fragile. The Last is relatively easy to use, but the interface is cumbersome with everything being controlled by a single button. . The actual load current is adjusted with analog potentiometers, and the digital display is only for controlling the current, not for controlling, so the adjustment is very sensitive. Although the MCU detects when the power level is too high, it doesn't turn it off to avoid damage to the device. I bought it to calibrate the PSU, but unfortunately the load is not stable enough and the current at least constantly fluctuates. 20 mA (at 5 A load), so stable readings cannot be obtained. As the device heats up, the current also drifts. Therefore it is unusable for my application.