Mini USB Load Tester – Power Bank Discharge Resistor 1A/2A

$6.04 $7.57

Mini USB Load Tester – Power Bank Discharge Resistor with Switch

Accurately test and discharge USB power banks, chargers, and battery packs with this compact Mini USB Load Tester. Featuring a built-in on/off switch and selectable 1A/2A discharge resistor, this handy module lets you measure voltage and current output, verify real-world capacity, and confirm that your USB power sources are performing as expected — all in a pocket-sized form factor.

Whether you're a hobbyist, electronics technician, or DIY enthusiast, this tester is an essential bench tool for evaluating USB ports, power banks, and charging adapters quickly and reliably.

Key Features

Selectable Load: Switch between 1A and 2A discharge modes to suit your testing needs
Built-in On/Off Switch: Easily start and stop discharge without unplugging
Voltage & Current Measurement: Verify real output of USB power sources
Compact Design: Measures approximately 7.5 × 1.7 × 1 cm (2.95 × 0.67 × 0.39 in) — fits anywhere on your workbench
High-Quality Construction: Brand-new components, built for repeated use
Multi-Pack Options: Available in 1, 2, or 3-piece sets for great value

Specifications

Discharge Current: 1A / 2A (switchable)
Dimensions: ~7.5 × 1.7 × 1 cm / 2.95 × 0.67 × 0.39 in
Battery Required: No
DIY Category: Electrical
Country of Origin: Made in Mainland China

⚠️ Important Safety Notice

The resistor will become hot during discharge, reaching temperatures of approximately 80–85°C. Do not touch the resistor surface during or immediately after use. Keep away from flammable materials and ensure adequate ventilation while testing. Handle with care.

What's in the Box

1 / 2 / 3 × Mini USB Load Tester (as selected)

Keep your workspace tidy with these related picks from our store:

10-Pack Silicone Cable Ties – Reusable Cord Organizers — perfect for managing USB and test cables
Screw Extractor Drill Bit Set 5 & 6 Pc – Carbon Steel — another essential tool for the DIY bench
Adjustable Label Roll Holder – 3D Printed Thermal Printer Stand — label your components and test gear with ease

Learn more: EPA guidance on lithium-ion battery handling

Frequently Asked Questions

Q: What does a USB load tester do and why do I need one?

A: A USB load tester simulates a real device drawing current from a USB power source. By applying a known 1A or 2A load, you can measure the actual voltage and current output of a power bank, USB charger, or hub — rather than just the advertised specs. This helps you identify underperforming chargers and verify true battery capacity.

Q: Is it safe to use this tester for extended periods?

A: The discharge resistor reaches temperatures of around 80–85°C during operation. Use it in short, monitored sessions in a well-ventilated area, keep it away from flammable surfaces, and never touch the resistor body while it is active. Always switch off using the built-in switch when testing is complete.

Q: What USB power sources can I test with this module?

A: This tester is compatible with any standard USB-A power source, including portable power banks, wall chargers, USB hubs, PC USB ports, and car chargers. It is ideal for DIY electronics projects, product quality checks, and general USB power verification.

Q: Does the tester include a display to show voltage and current readings?

A: This module functions as a load/discharge resistor with a switch. For precise numeric readouts, pair it with a dedicated USB voltage and current meter (sold separately). Together, they provide a complete picture of your USB power source's actual performance.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.