• USB Voltage Current Tester - Digital Power Meter & Charging Speed Monitor for Phone & Power Bank
  • USB Voltage Current Tester - Digital Power Meter & Charging Speed Monitor for Phone & Power Bank
  • USB Voltage Current Tester - Digital Power Meter & Charging Speed Monitor for Phone & Power Bank
  • USB Voltage Current Tester - Digital Power Meter & Charging Speed Monitor for Phone & Power Bank
  • USB Voltage Current Tester - Digital Power Meter & Charging Speed Monitor for Phone & Power Bank
  • USB Voltage Current Tester - Digital Power Meter & Charging Speed Monitor for Phone & Power Bank

USB Voltage Current Tester - Digital Power Meter & Charging Speed Monitor for Phone & Power Bank

No.MR-249
This is a USB voltage and current tester, also commonly known as a USB charging detector. Its main function is to measure and display key parameters such as voltage, current, and power passing through the USB interface in real time, helping users detect the actual output performance of accessories like chargers, power banks, and data cables.

Description

Item Value
Module Name USB Current & Voltage Detector
Measurement Accuracy 1%
Refresh Rate Approx. 200ms per cycle
Display Mode Alternating display of Current & Voltage
Voltage Measurement Range 3.5V - 7V
Current Measurement Range 0A - 3A
Operating Current 20mA
Color Transparent / Blue
Storage Temperature -10°C to +65°C
Voltage Drop (Meter) 200mV
Weight 15.4g
Outline Dimensions 52×20×15mm

☆ Product Features ☆

★ This device can measure the no-load and loaded voltage of USB-powered equipment, as well as the voltage and current of USB terminal devices during operation.
★ It utilizes an imported single-chip microcomputer for sampling and voltage display. Extensive data processing is performed via software to ensure accurate and stable display of data.
★ Featuring full SMT (Surface Mount Technology) craftsmanship, the module boasts exquisite manufacturing and an ultra-compact size.
★ It supports cyclic display of current and voltage, making it simple, convenient, and highly practical to use.
★ It is small and lightweight, requiring no additional power supply.

☆ Application & Usage ☆

★ It can conveniently measure the output voltage of USB ports and the operating current of connected devices.
★ It is plug-and-play, with no need for an external power supply or additional accessories.
★ It is ideal for detecting whether the voltage and current output from a USB charger meet standards.
★ Widely applicable in factories, laboratories, and by individual users.
Technical Specifications:
Operating Range: Current (0 - 2.5A) - Detects whether the voltage of the mobile phone charger meets the standard of DC 5V. 
Operating range: U = 3 - 7.5V  I = 0 - 2.5A
Resolution: Voltage 10mV  Current 10mA
Error: Voltage < ±1%  Current < ±2%
Full-scale voltage drop: 200mV (when measuring current)
Operating temperature: 0 - 60℃ 
Product dimensions: 53*35*14mm 
Packaging: PE bag 
This power test instrument adopts a new generation 4.5-digit dual-integration type cyclic conversion integrated circuit, equipped with a precise bandgap reference source. It has an accurate range, high precision, stable operation, reliable performance, strong anti-interference ability, and can withstand high temperatures. It can be used to measure the power supply or power consumption of products such as USB interfaces, mobile phone chargers, and USB drives. 
This product can measure the voltage of USB-powered devices when they are idle or under load, as well as the voltage and current when USB terminal devices are in operation. 
2. Current and voltage display in a cycle, which is easy to use and highly practical. 
3. Compact and portable, no need to connect an external power source.


We focus on three core product categories to meet diverse market demands:

 

1、Passive Components: We offer a comprehensive range of resistors, capacitors, inductors, and connectors, backed by stable stock and competitive pricing to support your continuous production needs.

 

2、Integrated Circuits (ICs) & Microcontrollers: Our portfolio features high-performance chips, including the ESP32 series, MCUs, and logic ICs. All components are sourced from authorized distributors to ensure guaranteed quality and authenticity.

 

3、PCB & PCBA Solutions: We provide complete supply chain support for printed circuit boards, ranging from prototype fabrication to mass production assembly, serving the IoT, consumer electronics, and industrial sectors.

 

Quality & Service Commitment
At Muren Technology, we prioritize authenticity and traceability. Every batch undergoes strict quality inspection with full lot traceability and customs declaration support. Whether you require samples, small-batch trials, or large-volume orders, our professional team ensures accurate delivery and long-term stable cooperation.

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