USB 5V 1A/2A Switchable Dummy Load Resistor Charger Tester

USB 5V 1A/2A Switchable Dummy Load Resistor Charger Tester is a plug-and-play constant-resistance USB aging and current-capacity load tester equipped with two 5W ceramic wirewound power resistors, a 1A/2A toggle switch, and dual status indicator LEDs. Plugging directly into any USB Type-A wall charger, power bank, or inline USB doctor volt-ammeter, it draws a precise 1.0A (5W at $5,Omega$) or 2.0A (10W at $2.5,Omega$) load current to verify whether a charger or USB cable can sustain its rated output without voltage droop.

Key Features:

• Switch-Selectable 1A / 2A Load Current: Onboard slide switch toggles between 1A load mode (single $5,Omega$ resistor active, 5W dissipation) and 2A load mode (two $5,Omega$ resistors in parallel = $2.5,Omega$, 10W dissipation).
• Dual Status Indicator LEDs: Separate red and green indicator LEDs confirm whether the 1A branch or full 2A parallel load is active.
• Heavy-Duty Ceramic Cement Wirewound Resistors: High-temperature 5W axial cement resistors provide stable resistance for charger stress testing and power bank discharge capacity measurement.
• Direct USB Type-A Male Plug: Plugs straight into USB wall adapters, power banks, PC ports, or the output port of a USB voltage/current meter (such as KWS-V20 / CHARGER Doctor).
• Instant Cable & Charger Quality Verification: Quickly reveals counterfeit 2A chargers or high-resistance USB cables when paired with an inline USB voltmeter.

Technical Specifications:

• Rated Input Voltage: 5.0V DC Nominal (via Standard USB Type-A Male Plug)
• Load Mode 1 (Switch in 1A Position): $5,Omega$ Load Resistance → 1.0A Current Draw (5W Power Dissipation)
• Load Mode 2 (Switch in 2A Position): $2.5,Omega$ Parallel Load Resistance → 2.0A Current Draw (10W Power Dissipation)
• Resistor Type: 2 × 5W $5,Omega$ (±5%) Flameproof Ceramic Wirewound Resistors
• Status Indicators: Dual Red/Green SMD LEDs

Mechanical Specifications:

• PCB Material: FR-4 Double-Sided Green Fiberglass Board with Thermal Vent Slots
• Connector: Standard USB Type-A Male Plug
• Selector Control: 2-Position Slide Toggle Switch (1A / 2A)

Dimensions:

• Length: 65 mm
• Width: 22 mm
• Height: 14 mm
• Weight: ~16 g

Pinout and Wiring:

• USB Type-A Male Plug: Pin 1 (+5V VBUS) and Pin 4 (GND) connected across the switchable $5,Omega$ / $2.5,Omega$ resistor network (D+ and D- data pins unconnected).
• Thermal Safety Warning: At 5W (1A) and 10W (2A) dissipation, the white ceramic resistors reach 80°C–150°C+ within 30–60 seconds! Never touch the ceramic resistors during or immediately after testing, and keep away from flammable surfaces.

Datasheet Reference:

• Ohm’s Law Verification: At $V = 5.0text{V}$: $I_{1A} = 5.0text{V} / 5,Omega = 1.0text{A}$ ($P = 5text{W}$) | $I_{2A} = 5.0text{V} / 2.5,Omega = 2.0text{A}$ ($P = 10text{W}$)

Commonly Used in:

• 5V 1A / 2A Mobile Phone Charger Load Regulation Testing
• USB Power Bank Real mAh/Wh Capacity Discharge Testing
• Micro-USB & Type-C Cable Voltage-Drop Resistance Auditing
• 5V Buck Converter & SMPS Load Transient Benchmarking

Applications:

• Plugs into the output of a USB volt-ammeter tester to verify whether a 5V 2A charger holds 5.0V under a true 2.0A load.
• Discharges 18650 power banks at a steady 1A or 2A rate to log true usable watt-hour capacity.
• Tests voltage drop across USB charging cables at 1A and 2A currents.

Equivalent Models:

• ZB2L3 18650 Li-ion Lithium Battery Capacity Tester: Programmable cutoff-voltage digital mAh capacity tester with external load resistors.

Package Includes:

• 1 × USB 5V 1A/2A Switchable Dummy Load Resistor Charger Tester