---
product_id: 83143574
title: "DROK USB Load Tester, Electronic Load Test Resistor Module 25W LD25 USB and Type C Interface Discharge Adjustable Constant Current 0.25A-4A Intelligent Temperature Control with Cooling Fan"
brand: "drok"
price: "₩47002"
currency: KRW
in_stock: true
reviews_count: 10
category: "Drok"
url: https://www.desertcart.kr/products/83143574-drok-usb-load-tester-electronic-load-test-resistor-module-25w
store_origin: KR
region: South Korea
---

# 4A max current 25W power capacity Intelligent temp control DROK USB Load Tester, Electronic Load Test Resistor Module 25W LD25 USB and Type C Interface Discharge Adjustable Constant Current 0.25A-4A Intelligent Temperature Control with Cooling Fan

**Brand:** drok
**Price:** ₩47002
**Availability:** ✅ In Stock

## Summary

> ⚡ Power-Test Like a Pro — Don’t Let Your Chargers Fail You!

## Quick Answers

- **What is this?** DROK USB Load Tester, Electronic Load Test Resistor Module 25W LD25 USB and Type C Interface Discharge Adjustable Constant Current 0.25A-4A Intelligent Temperature Control with Cooling Fan by drok
- **How much does it cost?** ₩47002 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/83143574-drok-usb-load-tester-electronic-load-test-resistor-module-25w)

## Best For

- drok enthusiasts

## Why This Product

- Trusted drok brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Smart Thermal Management:** Built-in cooling fan with temperature control keeps performance stable under heavy load.
- • **Precision Adjustable Load:** Fine-tune current from 0.25A to 4A for versatile USB device testing.
- • **Real-Time Digital Display:** 4-digit LED shows voltage, current, and power for instant, accurate diagnostics.
- • **Robust Safety Protections:** Over-voltage, over-power, and over-temperature safeguards prevent device damage.
- • **Dual USB & Type-C Compatibility:** Seamlessly test modern chargers and cables with both USB-A and USB-C interfaces.

## Overview

The DROK USB Load Tester is a professional-grade electronic load module designed for precise USB and Type-C charger and cable testing. It supports adjustable constant current from 0.25A to 4A, with a maximum power rating of 25W. Featuring intelligent temperature control and a cooling fan, it ensures stable operation during extended tests. The device includes a clear 4-digit LED display for real-time voltage, current, and power readings, alongside comprehensive safety protections against over-voltage, over-power, and overheating. Ideal for quality assurance, troubleshooting, and performance verification in both professional and enthusiast settings.

## Description

DROK USB Load Tester, Electronic Load Test Resistor Module 25W LD25 USB and Type C Interface Discharge Adjustable Constant Current 0.25A-4A Intelligent Temperature Control with Cooling Fan: desertcart.com: Industrial & Scientific

Review: Professional-Grade USB Testing Made Easy - Incredibly Accurate and Reliable! - 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.
Review: Great little device - I’m using this to keep my USB battery pack alive by providing a constant load, since my garage door sensors don’t draw enough power on their own to prevent the pack from shutting off. It works perfectly. One tip: although it’s advertised as only going down to 0.25A, it actually goes lower, which is ideal for my setup. I have it set at 0.11A — just enough to keep the pack active while running cooler and drawing less power. My sensors now stay powered 24/7 without any issues.

## Features

- What is it: it is a USB intelligent temperature control electronic load; with high power, high current, high voltage and intelligent control features.
- Easy Opeartion: set the load to resume normal operation manually or automatically after releasing the protection condition; can freely set the boot state to be on or off by default; 4-bit led digital display; check the load voltage value / current value / power value; intelligent temperature control cooling fan; Precision adjustable potentiometer; Over-voltage protection / overpower protection / over temperature protection.
- Protection Function: OVP overvoltage protection (25V-30V overvoltage protection, digital display OVP, permanent damage after more than 30V); OPP over-power protection (load temperature is greater than 80 °C, the device stops working, digital display OTP); OTP over-temperature protection (power greater than 25W, equipment stops working, digital display OPP).
- Application: can provide 4A, 25V, 25W (3 values can not used over range) constant current test discharge task. The friendly human-computer interface and excellent performance indicators can meet the diverse testing needs. It is suitable for measuring the output current capability of the charger, using the bulk aging test of the charger factory, and measuring the quality of the Micro USB charging cable and the Type-C charging cable.
- Note: the usb tester module has no reverse connection protection, the input polarity cannot be reversed, otherwise the product is permanently damaged and cannot be repaired.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07FL3PS57 |
| Brand | DROK |
| Color | black |
| Date First Available | July 14, 2018 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 0.01 ounces |
| Item model number | 200356 |
| Manufacturer | DROK |
| Measurement Type | Ammeter |
| Min. Operating Voltage | 4 Volts |
| Package Dimensions | 3.98 x 3.5 x 1.22 inches |
| Power Source | Corded Electric |
| Style | Digital |
| UPC | 701822755900 |
| Upper Temperature Rating | 40 Degrees Celsius |

## Product Details

- **Brand:** DROK
- **Color:** black
- **Item Weight:** 0.01 Ounces
- **Power Source:** Corded Electric
- **Style:** Digital

## Images

![DROK USB Load Tester, Electronic Load Test Resistor Module 25W LD25 USB and Type C Interface Discharge Adjustable Constant Current 0.25A-4A Intelligent Temperature Control with Cooling Fan - Image 1](https://m.media-amazon.com/images/I/71nN0nLE8yL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Professional-Grade USB Testing Made Easy - Incredibly Accurate and Reliable!
*by D***E on December 13, 2025*

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.

### ⭐⭐⭐⭐⭐ Great little device
*by Q***E on August 27, 2025*

I’m using this to keep my USB battery pack alive by providing a constant load, since my garage door sensors don’t draw enough power on their own to prevent the pack from shutting off. It works perfectly. One tip: although it’s advertised as only going down to 0.25A, it actually goes lower, which is ideal for my setup. I have it set at 0.11A — just enough to keep the pack active while running cooler and drawing less power. My sensors now stay powered 24/7 without any issues.

### ⭐⭐⭐⭐⭐ Excellent tool for testing USB cords and chargers
*by Q***N on August 14, 2025*

Awesome item for testing chargers and USB cords. Many reviews state that they put a power meter inline, but it's not necessary. This device does show voltage, amperage, and wattage, although only one at a time. I feel like the device should be inside of a case for better protection, but maybe that's not all that beneficial. If that keeps cost down, fine. My only complaint is the number of turns on the dial required to adjust the load. A full revolution only adds about 0.2 amps. Fine control is nice, but it takes a lot to go from 0 to 3 amps. It's definitely proven what cables I have are junk, as well as confirm that my chargers are better than I was expecting.

## Frequently Bought Together

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-02-21*