UGREEN 140W Four-Port GaN Charger Review: PD3.1, QR Flyback, and 3C1A Fast Charging

Why This Charger Matters

As laptops, phones, tablets, and TWS earbuds multiply, desktop charging becomes messy. Outlets run out, cables tangle, and many users still rely on several single-port chargers that cannot fast-charge multiple devices at once.

Traditional adapters often have fixed power and limited compatibility, forcing users to swap chargers throughout the day. UGREEN has responded with a family of PD3.1 high-power multi-port chargers built around high output, simultaneous charging, and low standby power.

This review focuses on the UGREEN 140W four-port GaN charger. It supports PD3.1 and a 140W peak output, uses a 3C1A interface layout, and adds intelligent power distribution.

Its QR flyback topology, smart thermal control, and UFCS certification help it work with most modern digital devices. The GaN design keeps the body relatively light and compact, making one charger enough for home, office, and travel.

Packaging and First Impressions

The retail box uses a simple black style with a product render on the front. Key selling points are clearly shown: 140W power, GaN technology, and smart temperature control. The back lists detailed specifications and package contents. The side includes FSC forest certification and soy ink markings, reflecting an environmentally conscious packaging approach.

Inside the box are the charger itself, a 1.5m 240W dual USB-C braided fast-charging cable, and warranty documentation. The charger has a matte texture with the UGREEN logo centered on the front. Its square shape and rounded corners give it a solid, refined look.

The rear lower-right corner is marked with 140W. On the output side, three USB-C ports and one USB-A port are arranged vertically, each with nearby function icons for easy identification.

The input side uses foldable Chinese-standard prongs that sit flush with the body when folded, reducing storage volume. The bottom panel prints full output parameters and 3C mandatory certification information.

Key Specifications and Model Details

The model number is X569. Its input rating is 100-240V~ 50/60Hz 2.0A Max. Output details are as follows:

USB-C1: 5V3A / 9V3A / 12V3A / 15V3A / 20V5A / 28V5A, 140W Max

USB-C2: 5V3A / 9V3A / 12V3A / 15V3A / 20V5A, 100W Max

USB-C3: 5V3A / 9V3A / 12V2.5A / 15V2A / 20V1.5A / 11V3A, 33W Max

USB-A: 5V3A / 9V2A / 12V1.5A / 10V2.25A / 11V3A, 33W Max

Total output: 140.0W Max

The manufacturer is Shenzhen UGREEN Technology Co., Ltd.

Size, Weight, and Power Density

Measured dimensions are approximately 69.27mm long, 69.27mm wide, and 32.99mm thick. The total volume is about 158.30cm³. With a 140W total output, power density reaches about 0.88W/cm³. The charger body weighs approximately 284.8g. This combination of high power and compact size is a major advantage for users who want a single desktop or travel charger.

Included 240W USB-C Cable

The bundled cable is a dual USB-C fast-charging cable with metal matte housings. Both ends carry the UGREEN brand and a 240W rating. Extended strain relief improves bending durability. The cable uses a high-density braided jacket that is more wear-resistant and dirt-resistant than ordinary TPE cables, and it resists tangling during daily storage.

A POWER-Z tester reads the eMarker chip as supporting 50V/5A 240W EPR power delivery. Data transfer is USB 2.0. This means the cable can fully release the charger’s 140W PD3.1 fast-charging performance.

QR Flyback Architecture Explained

QR flyback, or quasi-resonant flyback, is a widely used soft-switching topology in fast-charging power supplies. Unlike a traditional hard-switching flyback, it uses the transformer magnetizing inductance and the switch’s parasitic capacitance to form a resonant tank. The switch is turned on when the drain voltage oscillates to its lowest valley. This avoids the high-loss region of high-voltage hard turn-on and significantly reduces voltage-current overlap losses during switching.

In this 140W four-port GaN charger, the QR architecture matches the high-frequency operating characteristics of GaN devices. It helps improve full-load conversion efficiency, reduce heat, and work with the smart thermal control system to stabilize sustained high-power output. It also suppresses electromagnetic interference and simplifies the peripheral circuit. As a result, UGREEN can fit a 3C1A multi-port configuration into a compact body while balancing safety compliance, reliability, performance, power density, and cost.

Certification and Compliance

Certification records show that the UGREEN 140W four-port GaN fast charger has passed CQC China Quality Certification Center approval. The certificate number is 2024010907733612. It was first issued on December 6, 2024, and remains valid until October 29, 2029. Its current status is active.

The charger also carries 3C mandatory certification. In addition, it comes from a company involved in drafting the GB 20943-2025 new power supply energy efficiency standard, which supports its positioning as an energy-conscious product.

One Charger Replaces Four

The UGREEN 140W four-port GaN charger can replace four traditional single-port chargers. Its compact size covers multi-device charging needs and greatly reduces desktop footprint and travel storage space. With a 3C1A layout, several devices can charge together without waiting in line.

In one test, the charger powered two laptops and a phone simultaneously. The four output paths delivered about 64.77W, 43.66W, 12.16W, and 7.31W, for a total of about 127.9W.

The charger dynamically allocated power while keeping two USB-C ports in high-voltage PD fast charging and assigning lower-voltage output to the remaining ports. The scheduling logic was clear and met the parallel power needs of laptops, tablets, and phones.

Multi-Device Output Tests

In a multi-device concurrent output test, two laptops were connected at the same time. Both USB-C ports negotiated PD3.0 fast charging. Measured output was about 64.8W and 62.57W, totaling about 127.4W. The charger distributed power intelligently, and dual-laptop fast charging showed no obvious downgrade. This suits desktop setups that need to power two computers at once.

In a three-device test, two laptops and one tablet were connected. All three ports negotiated PD3.0. Output was about 64.79W, 43.71W, and 19.34W, for a total of about 127.84W. Under multiple loads, the charger continued dynamic power scheduling, and each device remained stable without a cliff-like power drop. This makes it suitable for desks with laptops and tablets charging together.

Everyday Use and Portability

Thanks to the high power density of the GaN solution, the 140W four-port charger remains compact despite its multi-port, high-power design. The foldable Chinese-standard prongs make it easy to store in a small compartment of a bag. For business trips and commutes, one charger can replace several single-port adapters and simplify travel gear.

The 3C1A output configuration supports phones, tablets, TWS earbuds, and other devices at the same time. It covers daily desktop charging needs in one unit, reducing outlet occupation and making cable routing cleaner. The result is a tidier, more efficient desktop.

Protocol Support: USB-C1

Using a POWER-Z KM003C, USB-C1 supports UFCS, QC3+, FCP, SCP, AFC, PD3.1, PPS, QC5, DCP, SAM 2A, and Apple 2.4A charging protocols. Its PDO report includes six fixed voltage steps: 5V3A, 9V3A, 12V3A, 15V3A, 20V5A, and 28V5A. It also supports a 5-21V 5A PPS range and a 15-28V 140W AVS range. For UFCS, it supports 3.4-5.5V 3A, 5.5-11V 3A, and 11-21V 3A.

Protocol Support: USB-C2

USB-C2 supports QC3.0, FCP, SCP, AFC, SFCP, PD3.0, PPS, QC5, DCP, SAM 2A, and Apple 2.4A. Its PDO report includes 5V3A, 9V3A, 12V3A, 15V3A, and 20V5A fixed voltage steps, plus a 5-21V 5A PPS range. This makes it well suited to high-power laptops, tablets, and smartphones that rely on PD or PPS.

Protocol Support: USB-C3

USB-C3 supports UFCS, QC3+, FCP, SCP, PD3.0, PPS, QC4+, DCP, SAM 2A, and Apple 2.4A. Its PDO report includes 5V3A, 9V3A, 12V2.5A, 15V2A, and 20V1.5A fixed steps, plus a 5-11V 3A PPS range. For UFCS, it supports 3.4-5.5V 3A and 5.5-11V 3A. This port is ideal for phones, tablets, accessories, and other moderate-power devices.

Protocol Support: USB-A

The USB-A port supports UFCS 1.0, QC3+, FCP, SCP, AFC, DCP, SAM 2A, and Apple 2.4A. Its UFCS report includes 3.4-5.5V 3A and 5.5-11V 3A. Across the UGREEN PD3.1 series, six models cover mainstream fast-charging protocols and provide strong compatibility for laptops and phones.

Performance, Efficiency, and Safety

The charger delivers stable real-world performance. A single port can reach the full 140W fast-charging output, quickly recharging high-performance laptops. When multiple devices are connected, intelligent power distribution allows four-way concurrent output to reach about 127.9W, eliminating the need for several chargers on a desk.

As a product from a drafting unit of the GB 20943-2025 new power supply energy efficiency standard, it aligns with high-tier industry efficiency expectations. Standby power is very low under both high and low voltage conditions. Conversion efficiency at high power levels exceeds 90%, reducing overall loss and heat. Ripple performance is also good across all ranges, providing clean and stable output.

Final Verdict

The UGREEN 140W four-port GaN fast charger focuses on high power and multi-port concurrent charging. It combines a QR flyback architecture, GaN fast-charging technology, PD3.1, UFCS, and other mainstream protocols. Its 3C1A configuration works with laptops, phones, tablets, and many other devices, making it suitable for home, office, and travel.

It supports 140W single-port charging, smart power allocation for multiple devices, and roughly 127.9W total output with four active ports. The foldable plug, compact body, bundled 240W braided cable, and 3C/CQC certifications add further value. For users who want one powerful, efficient, and safe charger for a full desktop setup, this model is a strong all-round choice.