---
product_id: 469705512
title: "YOJOCK USB C Tester Power Meter 4-30V 0-6.5A Voltage and Current Tester Meter, USB Capacity, Temperature, Working Time Ammeter Voltmeter Power Bank Charger Detector (Classic Version)"
brand: "yojock"
price: "€ 19.08"
currency: EUR
in_stock: true
reviews_count: 13
category: "Yojock"
url: https://www.desertcart.pt/products/469705512-yojock-usb-c-tester-power-meter-4-30v-0-6
store_origin: PT
region: Portugal
---

# Fast Charging Support Data Storage Feature Wide Voltage Range YOJOCK USB C Tester Power Meter 4-30V 0-6.5A Voltage and Current Tester Meter, USB Capacity, Temperature, Working Time Ammeter Voltmeter Power Bank Charger Detector (Classic Version)

**Brand:** yojock
**Price:** € 19.08
**Availability:** ✅ In Stock

## Summary

> 🔍 Discover the Power of Precision!

## Quick Answers

- **What is this?** YOJOCK USB C Tester Power Meter 4-30V 0-6.5A Voltage and Current Tester Meter, USB Capacity, Temperature, Working Time Ammeter Voltmeter Power Bank Charger Detector (Classic Version) by yojock
- **How much does it cost?** € 19.08 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/469705512-yojock-usb-c-tester-power-meter-4-30v-0-6)

## Best For

- yojock enthusiasts

## Why This Product

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

## Key Features

- • **Unleash Fast Charging:** Supports QC2.0/3.0/4.0 and Super VOOC protocols for lightning-fast charging.
- • **Data at Your Fingertips:** Power-off storage function retains capacity and energy data for easy access.
- • **User-Friendly Interface:** Easily switch screens and clear data with intuitive button functions.
- • **Perfect for Tech Enthusiasts:** Ideal for quality inspection of digital devices and a must-have for gamers.
- • **Versatile Voltage Measurement:** Accurately measures voltage from 4V to 30V and current up to 6.5A.

## Overview

The YOJOCK USB C Tester Power Meter is a compact and versatile device designed for measuring voltage and current in USB-C connections. It supports various fast charging protocols and features a power-off storage function for data retention, making it an essential tool for digital enthusiasts and professionals alike.

## Description

Product Description YOJOCK Upgraded USB TESTER - KWS-066C NOTE If it is powered by the USB A charger, the screen of USB Tester will light up without connecting charging device. If it is powered by a PD (Type-C) charger, it requires a charging device to be connected to light up the USB Tester Screen. Package Included 1 x USB C Tester 1 x Storage Box 1 x User Manual Method of operation 1. Click the button once to switch screens in a cyclical manner. 2. Double-click the button to rotate the displayed content. 3. Press and hold the button (3 seconds): Clear all capacity, amount of electricity, and time. Specification Model: KWS-066C Voltage: 4-30V Current: 0-6.5A Power: 0-195W Capacitance: 0-999999mWh Load resistance: 1-9999.9Ω Time: 0-99h Temperature: 0-80℃ Test direction: bi-directional Additional Notes Please note that under normal circumstances the meter will not power on without a device connected (host, charger, accessory, etc) at both ends. Test the Maximum Output Current of the Charger The USB meter can test the highest current output of the Wireless Charger/ Wireless Charging Stand/Wireless Charging Pad. With power-off storage function, which is convenient for subsequent viewing. Test Capacity and Electric Energy of Power Bank Fully charge power bank firstly, then connect this USB C tester to it and reset the capacity and electric energy by long pressing. Then fully discharge with USB C meter by 5v load till power bank run out of its energy. The mAh shows is the real capacity of your power bank. Monitor The Charging Status in Real Time When powering the Type-C devices, connect a YOJOCK test meter to monitor the voltage, current, capacity, power, temperature and other technical parameter information in real time. Two Screen Display

Review: Easy and quick to use - YOJOCK USB C TESTER. Fast delivery. Securely packaged. Easily readable, uncomplicated display. I've used this for only a few days. It's shown some interesting results in the changing voltage and current levels from different chargers to sundry connected devices, so, for its performance so far, I'll give it five stars.
Review: Very useful tool - Love this little device. I had a lot of chargers and cables that all seemed to perform differently with different devices. With the aid of this tool, I was able to definitively ascertain and verify the capabilities of each charger and cable once and for all.

## Features

- Detect Various Fast Charging Protocols: The Type-C USB tester supports QC2.0/3.0/4.0, Super VOOC and supports electrical signal monitoring during PD2.0/3.0 fast charging protocol, meeting the needs of various mobile phone users.
- Measuring Data is Guaranteed: Power-off storage function that stores capacity and energy data when the mobile power is turned off, which is convenient for subsequent viewing and convenient for capacity energy measurement of mobile power.
- Wide Applicability: This USB C Tester Measuring voltage: 4V-30V; measuring current: 0-6.5A. YOJOCK Tester are widely used in the quality inspection of 3C digital peripheral products, and are the first choice for digital gamers and electronic enthusiasts.
- Button Function: 1.Click the button once to switch screens in a cyclical manner; 2.Double-click the button to rotate the displayed content; 3.Press and hold the button (3 seconds): Clear all capacity, amount of electricity, and time.
- Note: The button of this usb tester will make a sound when it is shaken, which is not a product defect. This is an adjustment to be made to quickly double-click the button, which is a normal situation.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B99Z2GJK |
| Best Sellers Rank | 39,595 in DIY & Tools ( See Top 100 in DIY & Tools ) 79 in Voltage Testers |
| Brand | YOJOCK |
| Colour | Black |
| Compatible Devices | USB C Devices |
| Country Of Origin | China |
| Customer Reviews | 4.5 out of 5 stars 1,388 Reviews |
| Included Components | USB C Tester |
| Item Weight | 40 Grams |
| Item weight | 40 Grams |
| Manufacturer | YOJOCK |
| Manufacturer Part Number | KWS-066C |
| Maximum Operating Voltage | 30 Volts |
| Measurement Type | Ammeter, Voltmeter |
| Min. Operating voltage | 4 Volts |
| Minimum Operating Voltage | 4 Volts |
| Model Number | YJ-TC01 |
| Power Source | Corded Electric |
| Power source | Corded Electric |
| Specification Met | energy |
| Style | Compact |
| Style Name | Compact |
| Unit Count | 1.0 count |

## Product Details

- **Brand:** YOJOCK
- **Colour:** Black
- **Item weight:** 40 Grams
- **Power source:** Corded Electric
- **Style:** Compact

## Images

![YOJOCK USB C Tester Power Meter 4-30V 0-6.5A Voltage and Current Tester Meter, USB Capacity, Temperature, Working Time Ammeter Voltmeter Power Bank Charger Detector (Classic Version) - Image 1](https://m.media-amazon.com/images/I/618dV4sHrLL.jpg)
![YOJOCK USB C Tester Power Meter 4-30V 0-6.5A Voltage and Current Tester Meter, USB Capacity, Temperature, Working Time Ammeter Voltmeter Power Bank Charger Detector (Classic Version) - Image 2](https://m.media-amazon.com/images/I/812hnVrGOkL.jpg)
![YOJOCK USB C Tester Power Meter 4-30V 0-6.5A Voltage and Current Tester Meter, USB Capacity, Temperature, Working Time Ammeter Voltmeter Power Bank Charger Detector (Classic Version) - Image 3](https://m.media-amazon.com/images/I/71Hk-NdsBUL.jpg)
![YOJOCK USB C Tester Power Meter 4-30V 0-6.5A Voltage and Current Tester Meter, USB Capacity, Temperature, Working Time Ammeter Voltmeter Power Bank Charger Detector (Classic Version) - Image 4](https://m.media-amazon.com/images/I/61XS1A6NGGL.jpg)
![YOJOCK USB C Tester Power Meter 4-30V 0-6.5A Voltage and Current Tester Meter, USB Capacity, Temperature, Working Time Ammeter Voltmeter Power Bank Charger Detector (Classic Version) - Image 5](https://m.media-amazon.com/images/I/612sM1kCwkL.jpg)

## Questions & Answers

**Q: With some chargers, no current is passed on, the display remains dark. What could be the reason?**
A: The output and input of this USB tester should be connected at same time, so that the screen lights up. Make sure one end is connected to the charger and the other end is connected to the load.

**Q: Does the device save data (charged mah) after being unplugged?**
A: Yes, this USB tester has auto save function when power off. The saved data can be read on the next connection.

**Q: What should I do if I receive a damaged product?**
A: Our goods arrive at the Amazon warehouse after long-distance international transportation, and there is inevitably a certain defect rate. If you receive a damaged product, you can contact our customer service through Amazon, we will reply you within 24 hours and provide you with a satisfactory solution.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Easy and quick to use
*by A***E on 22 March 2026*

YOJOCK USB C TESTER. Fast delivery. Securely packaged. Easily readable, uncomplicated display. I've used this for only a few days. It's shown some interesting results in the changing voltage and current levels from different chargers to sundry connected devices, so, for its performance so far, I'll give it five stars.

### ⭐⭐⭐⭐⭐ Very useful tool
*by T***N on 29 December 2025*

Love this little device. I had a lot of chargers and cables that all seemed to perform differently with different devices. With the aid of this tool, I was able to definitively ascertain and verify the capabilities of each charger and cable once and for all.

### ⭐⭐⭐⭐⭐ No problems. Plugs into my short-ish universal charger USBC socket
*by A***R on 28 February 2026*

Works fine on my iPad pro showing charging at 15V 1.2A. The other meter I've got has a short USBC plug for some reason and won't connect to the charger when plugged in. Which is why I got this one.

## Frequently Bought Together

- YOJOCK USB C Tester Power Meter 4-30V 0-6.5A Digital Multimeter, Type C Voltage and Current Tester Meter, Power Capacity, Working Time Ammeter Voltmeter USB Cable Charger Detector (Classic Version)
- Eversame 2 in 1 Type C USB Tester Color Screen LCD Digital Multimeter, USB C Voltage Current Voltmeter Amp Volt Ammeter Detector USB Cable Charger Indicator DC3.6-30V/0-5.1A
- YOJOCK USB Tester Multimeter Digital 4-30V 0-6.5A, QC 3.0 Power Meter Voltage and Current Tester Detector, Volmeter Ammeter Power Bank Capacity Tester with IPS Color Display

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-05-31*