# Uni-T UT658A USB Tester for Voltage and Current Monitoring

**URL:** https://aio.lv/en/product--unit-ut658a--12478405
**Data updated:** 2026-05-22 07:21 (EEST)
**Category:** Electronics Accessories
**Manufacturer:** Unit
**Manufacturer code:** UT658A
**EAN:** 6935750565872
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 13.49 €
**Prices and availability valid until:** 2026-07-09 23:59
**Price without VAT (21%):** 11.15 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--unit-ut658a--12478405

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 25.06.2026 | free |
| Pickup points | 30.06.2026 | 1.99 EUR |
| Courier delivery to door | 30.06.2026 | 4.99 EUR |

## Summary description

The Uni-T UT658A is a professional USB tester designed to measure voltage, current, and capacity of USB-powered devices. It provides accurate real-time monitoring of power output, helping to diagnose charging issues or verify the performance of cables, power banks, and chargers. Featuring a clear display, this compact tool is essential for electronics enthusiasts and technicians requiring reliable data on USB port power delivery and device charging efficiency.

## Long description

The Uni-T UT658A is a professional USB tester designed to monitor the electrical parameters of chargers, power banks, USB Type-A cables, and various USB-powered devices. This compact tool provides accurate real-time measurements of voltage, current, capacity, and energy, helping users diagnose charging issues and verify the performance of their equipment. It is an essential instrument for electronics enthusiasts, technicians, and anyone needing reliable data on USB port power delivery and charging efficiency.
Advantages
This tester offers high precision in monitoring power output, allowing for the quick assessment of the condition and quality of cables and power adapters. Its support for QC 3.0 fast-charging protocols makes it highly versatile for modern electronics. The device features a clear, easy-to-read display that shows multiple parameters simultaneously, which significantly speeds up result analysis. With the ability to store up to 10 data sets and record for nearly 100 hours, it provides excellent utility for long-term testing and comparative analysis of different power sources.
Suitable for
Verifying the output quality of USB wall chargers and power banks
Testing the integrity and charging performance of USB Type-A cables
Diagnosing slow charging issues in smartphones and tablets
Monitoring energy consumption of small USB-powered electronics
Engineering and service tasks requiring precise electrical measurements
When it may not be suitable
The Uni-T UT658A is designed specifically for USB Type-A interfaces. It is not suitable for devices that exclusively use USB Type-C or other non-USB-A connectors without the use of additional adapters, which may affect measurement accuracy. Furthermore, it is not intended for high-power industrial applications exceeding its 3A current limit.
Key specifications
Input and output ports: USB Type-A
Voltage measurement range: 4–24V DC
Current measurement range: 0.05–3A DC
Capacity measurement: 0–99,999 mAh
Energy measurement: 0–1,000 Wh
Equivalent circuit resistance: 1–480 Ω
Data storage: 10 sets
Fast charging protocol support: QC 3.0
Dimensions: 93 x 45 x 13 mm
Weight: 50.6 g
How to use
To use the Uni-T UT658A, simply plug the tester into a powered USB Type-A port, such as a wall charger or a computer port. Once connected, plug your USB cable and the device you wish to test into the output port of the tester. The display will immediately show the real-time voltage and current. You can navigate through the stored data sets and monitor the energy and capacity accumulation as your device charges. Ensure that the total current draw does not exceed the device specifications to maintain accurate readings and prevent damage.
What to consider before purchase
Ensure your devices use USB Type-A connections for compatibility
Check if your charging requirements fall within the 3A current limit
Verify if you need support for protocols other than QC 3.0
Usage recommendations: Always ensure the tester is firmly connected to the USB port to avoid intermittent readings. For the most accurate capacity measurements, start the recording process when the target device is at a low battery level and allow it to charge until full.

## FAQ

### How much does the Uni-T UT658A USB Tester cost, and is it available for purchase?

The price is 13.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 120 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 25.06.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Unit products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Unit service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/12478405/68799326_large.webp