The UGREEN 50339 (CD137) 20W PD fast charger promises speedy charging for a range of devices, including the latest iPhones like the iPhone 15 Pro Max. But does it deliver on its claims? I’ve put this compact USB-C charger through its paces over the past few weeks to bring you this comprehensive review.

The UGREEN 50339 boasts several key features, including its 20W Power Delivery (PD) fast charging capabilities, compatibility with various charging protocols (PD, QC 4.0/3.0/2.0), and broad device compatibility. The compact design makes it ideal for travel, and the manufacturer highlights its built-in safety features to protect your devices from over-voltage, overheating, and short-circuiting. This promises a safe and efficient charging experience. I found the compact form factor very easy to pack for travel, easily fitting into my laptop bag without taking up much space.

Charging speeds were impressive. My iPhone 14 Pro Max, which is usually a power-hungry device, charged significantly faster than with my older 5W charger. While the advertised 0-50% in 30 minutes wasn’t quite reached in my testing (closer to 40 minutes), it was still a notable improvement. I also tested the charger with my Samsung Galaxy S22, and the charging speed was also noticeably faster compared to my slower Samsung wall adapter. The charger remained cool to the touch even during extended use, which is a positive sign of efficient heat dissipation. The charger’s performance is consistent across different devices, with minor variations based on the device’s charging specifications.

Pros:

• Fast charging speeds for compatible devices
• Compact and portable design
• Wide device compatibility
• Good build quality
• Remains cool during operation

Cons:

• Charging speeds may not always meet the advertised claims, depending on device
• The cable is not included (though this isn’t uncommon with chargers)

Overall, the UGREEN 50339 20W PD Fast Charger (CD137) is a solid choice for anyone looking for a fast and reliable charger for their iPhone 15 Pro Max, iPhone 14 series, Samsung devices, or other compatible smartphones. While the advertised charging speed wasn’t always completely realized, the improvement over standard chargers is considerable. The compact design and good build quality make this a great addition to my travel kit, and the overall safety features instill confidence. I would recommend this charger without hesitation.