Droking USB Load Tester, Electronic Load Test Resistor Module 25W LD25 USB & Type C Interface Discharge Adjustable Constant Current 0.25A-4A Intelligent Temperature Control with Cooling Fan

I am using this for a constant discarge of my power banks in combination with a professional USB power meter. The electronic load works well. The accuracy of the A display is a bit off (not much) but constant. The device itself is small with nice "feet" so the warm heatsink cannot contact anyting for safety. Also the ventilator switches on and off to keep the termperature constant. Because the imputs can be USB-A male, micro USB-B female and USB-C female you can connect every USB cable coming from a power supply / power bank. Works well.

Funciona muy bien y es bastante preciso. Según las mediciones que he hecho, la corriente que se solicita sólo está desviada por 0.01A en mi unidad, lo cual es poco. Mi única observación es que el potenciometro esta un poco suelto, les faltó soldarlo completamente plano a la placa. Pero no tengo problemas, funciona excelente por el precio.

The device works well however we can only achieve 17W for some reason. We have had to use additional loads to boost the amount for our testing to 25W which wasn't ideal.

This DROK USB Load Tester is an essential tool for anyone who works with USB devices or wants to verify their chargers and cables are performing correctly! The adjustable constant current feature from 0.25A to 4A makes it incredibly versatile - I've been able to test everything from low-power accessories to high-output fast chargers. The dual interface compatibility with both standard USB and Type-C is perfect for modern testing needs since everything is transitioning to USB-C. The build quality is solid, and the controls are intuitive and easy to adjust. I've used it to identify faulty cables and chargers that were delivering inconsistent power, which has saved me from potential device damage. The intelligent temperature control with the built-in cooling fan is a brilliant feature that really sets this apart from cheaper testers. Even when running sustained 25W tests, the unit stays cool and stable. The display is clear and easy to read, giving me accurate real-time readings of voltage and current. This has become an indispensable part of my testing toolkit - whether I'm verifying new charging equipment, troubleshooting power delivery issues, or just satisfying my curiosity about how well my chargers actually perform. For the price, you get professional-grade testing capabilities that are normally found in much more expensive equipment. If you're serious about electronics, charging infrastructure, or just want peace of mind about your power sources, this is an outstanding investment.

very helpfull and good testing device good for testing power bank claims that saw well we put out 15v @ 1,5 amp well this meter you can set it to that load and than see if you some the power bank and believe me ive smoked a few with it just going 10% under normal limit from a good brand power bank seems some brands over charge their power banks a bit in the price range 20-40 euro watch it almost all fail tests and kinda begin to get verry hot to stop test for safe reasons.

Excellent for checking USB-C Power Delivery profiles and sustained load output. Useful for confirming voltage steps (5V/9V/15V/20V), monitoring amperage draw, and validating cable capability. The data accumulation feature is helpful for longer testing sessions. Small form factor but still very capable. Great addition for anyone who likes understanding their power setup in detail.