---
product_id: 525467161
title: "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)"
brand: "yojock"
price: "S$20"
currency: SGD
in_stock: true
reviews_count: 11
category: "Yojock"
url: https://www.desertcart.sg/products/525467161-yojock-usb-c-tester-power-meter-4-30v-0-6
store_origin: SG
region: Singapore
---

# Power-off data storage 4-30V voltage range 0-6.5A current measurement 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)

**Brand:** yojock
**Price:** S$20
**Availability:** ✅ In Stock

## Summary

> ⚡ Empower Your USB-C Game with Precision & Speed!

## Quick Answers

- **What is this?** 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) by yojock
- **How much does it cost?** S$20 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/525467161-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

- • **Smart Data Retention:** Power-off storage saves your capacity and energy data for seamless tracking and analysis anytime.
- • **Precision Power Insights:** Accurately measures voltage, current, capacity, and power for USB-C devices, ensuring you never miss a watt.
- • **Intuitive One-Button Control:** Cycle, rotate, or reset readings with simple clicks—effortless monitoring for busy pros.
- • **Wide Voltage & Current Range:** Handles 4V-30V and up to 6.5A, perfect for everything from casual charging to advanced battery testing.
- • **Universal Fast-Charge Compatibility:** Supports QC2.0/3.0/4.0 & Super VOOC protocols to keep your devices juiced at lightning speed.

## Overview

The YOJOCK USB C Tester Power Meter is a compact, reliable digital multimeter designed for professionals and tech enthusiasts. It measures voltage (4-30V), current (0-6.5A), power, capacity, and more, supporting major fast-charging protocols. Featuring power-off data storage and intuitive controls, it’s ideal for quality testing, troubleshooting, and optimizing USB-C charging setups.

## Description

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): desertcart.com: Tools & Home Improvement

Review: Accurate, reliable, and easy to use. - This little tester is a must-have for anyone working with USB-C charging. I’ve used it to check power output, charging speed, and cable quality — and it gives fast, accurate readings every time. The screen is clear and easy to read, and the build quality is solid. I’ve purchased it twice now and it’s never let me down. Highly recommended for techs and tinkerers.
Review: Robust voltage range is great for battery testing - I like working with USB-C. I also like working with USB-C out of spec; the cable's very convenient, small, plentiful, and cheap; I have lots of male and female breakouts. I've found the device will accept down to right around 3.5V before cutting out (perhaps at the expense of accuracy, but it has seemed within expectations with most LiPo cells meeting their rating). The 3.5V minimum makes it unsuitable for single LiFePO4 cells, but you can run two in series and be fine; it is also almost fully useful for single LiPo cells given their "voltage cliff" in capacity through discharge; you will miss out on capturing maybe 5% of total capacity, and discharge that low is bad for battery lifespan, anyway. The neat thing about it handling higher voltages is that my DIY power sink is also reasonably voltage-tolerant, so I can still capture full Ah and Wh I need without adjusting anything -- but if I needed to, I could also move a linear regulator downstream of this wattmeter device (into my sink circuit) and get 5V out without introducing the huge inaccuracies which would come from having the regulator upstream of this wattmeter. Though from a cost/value perspective, I would say this device is essentially already perfect, a feature I would appreciate in a future revision or separate "power-user SKU" is a programmable voltage cutoff, where the device would flip a relay; or the cheaper/simpler option may be to close the circuit when the screen shuts off at ~3.5V, and this would be suitable for single-cell LiPo testing without risking dangerous overdischarge (though it was not too much expense or trouble to rig up an auto-cutoff myself in the power sink circuit with a relay and a comparator IC). I'll grant I'm probably in a pretty small niche of people who would appreciate that, though; there may not, in fact, be dozens of us.

## Features

- Multi-function: This USB tester is designed to detect voltage, current, capacity, electric quantity, power, temperature, resistance, charging time and other data of the USB C devices, which is convenient for testing power supply and quality.
- Detect Various Fast Charging Protocols: The Type-C USB tester supports QC2.0/3.0/4.0 and Super VOOC protocol charging, but the name of the fast charging protocol will not be displayed on the USB tester.
- 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.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B99Z2GJK |
| Best Sellers Rank | #25,200 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #46 in Multi Testers |
| Brand | YOJOCK |
| Color | Black/Silver |
| Date First Available | August 11, 2022 |
| Item Weight | 1.41 ounces |
| Item model number | YJ-TC01 |
| Manufacturer | YOJOCK |
| Maximum Operating Voltage | 30 Volts |
| Measurement Type | Ammeter, Voltmeter |
| Min. Operating Voltage | 4 Volts |
| Package Dimensions | 3.94 x 3.62 x 0.75 inches |
| Power Source | Usb |
| Specification Met | 3c |
| Style | USB C Tester |

## Product Details

- **Brand:** YOJOCK
- **Color:** Black/Silver
- **Item Weight:** 40 Grams
- **Power Source:** Usb
- **Style:** USB C Tester

## Images

![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) - Image 1](https://m.media-amazon.com/images/I/618dV4sHrLL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Accurate, reliable, and easy to use.
*by T***S on August 6, 2025*

This little tester is a must-have for anyone working with USB-C charging. I’ve used it to check power output, charging speed, and cable quality — and it gives fast, accurate readings every time. The screen is clear and easy to read, and the build quality is solid. I’ve purchased it twice now and it’s never let me down. Highly recommended for techs and tinkerers.

### ⭐⭐⭐⭐⭐ Robust voltage range is great for battery testing
*by K***J on December 4, 2023*

I like working with USB-C. I also like working with USB-C out of spec; the cable's very convenient, small, plentiful, and cheap; I have lots of male and female breakouts. I've found the device will accept down to right around 3.5V before cutting out (perhaps at the expense of accuracy, but it has seemed within expectations with most LiPo cells meeting their rating). The 3.5V minimum makes it unsuitable for single LiFePO4 cells, but you can run two in series and be fine; it is also almost fully useful for single LiPo cells given their "voltage cliff" in capacity through discharge; you will miss out on capturing maybe 5% of total capacity, and discharge that low is bad for battery lifespan, anyway. The neat thing about it handling higher voltages is that my DIY power sink is also reasonably voltage-tolerant, so I can still capture full Ah and Wh I need without adjusting anything -- but if I needed to, I could also move a linear regulator downstream of this wattmeter device (into my sink circuit) and get 5V out without introducing the huge inaccuracies which would come from having the regulator upstream of this wattmeter. Though from a cost/value perspective, I would say this device is essentially already perfect, a feature I would appreciate in a future revision or separate "power-user SKU" is a programmable voltage cutoff, where the device would flip a relay; or the cheaper/simpler option may be to close the circuit when the screen shuts off at ~3.5V, and this would be suitable for single-cell LiPo testing without risking dangerous overdischarge (though it was not too much expense or trouble to rig up an auto-cutoff myself in the power sink circuit with a relay and a comparator IC). I'll grant I'm probably in a pretty small niche of people who would appreciate that, though; there may not, in fact, be dozens of us.

### ⭐⭐⭐⭐⭐ Very nice little testing device
*by S***1 on July 13, 2023*

The display is excellent. USB-C in either direction and allows all kinds of testing as long as you have a few USB-A to USB-C adapters (both male to female and female to male). The data seems accurate given that I know what kind of power I should see from/to a certain device. Although I am still confused by the calibration "feature" of this. It seems odd to need to do this, and when I tried it nothing changed. That probably means it wasn't necessary, but I wonder how wrong the data would be if it became uncalibrated and I failed to calibrate when necessary... and how do I know when I need to calibrate! I really like the mAh and mWh resettable readings as it gives a good way to test battery capacity and efficiency (how much power it takes to fully charge vs how much power you get out of it!) I suspect a lot of people buy these for testing something and return a month later, but I think for the very small price I'll keep this on hand.

## 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)
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- 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 Singapore*
*Store origin: SG*
*Last updated: 2026-02-05*