Review Ugreen 20W SV137
Tags: Ugreen, Sales, Review, 2021, Charger

Review of the new 20W type-C charger from Ugreen. This charger is suitable for both travel and home use. It combines excellent performance with modest overall dimensions. In addition, the manufacturer has made a large “margin” in output power.

Link to the mains charger Ugreen 20W CB137 in China:

Ugreen 20W SV137 on Store

Specifications:

Brand / Model: Ugreen CD137 or Ugreen 20W;

Input parameters: 100–240V ~ 60 / 60Hz 0.5A Max;

Fast charging protocols including QC, PD: yes;

Output characteristics of ports: USB-C: 5V / 3A 9V / 2.22 A 12V / 1.67A;

Output power: 20W;

Overall dimensions: 61 * 42 * 23 mm.

Equipment:

Packaging made of thin, strong cardboard with excellent quality printing. The front side shows: charger, brand name, some advantages (provided protections and support for fast charging).

The back side shows the main characteristics of the model.

After opening the package, the charging unit itself and instructions for use are met. It should be noted that this model lacks instructions in English, as was the case with the 65w model.

Appearance

The charging unit is incredibly small in size (width — 61mm, height — 42mm, depth — 23mm). European type plug. The front side shows the brand of the charger, the back shows the main specifications of the device.

A distinctive feature is the use of a usb type C port, instead of the usual type A. The use of this particular connector determines some features, in the form of support for fast charging (20 and 18 watts, respectively) for Apple devices, as well as support for the Power Delivery protocol.

The weight was a modest 49 grams.

Testing in practice

With the help of the WEB U2 tester, all supported charging protocols were checked.

The charger supports most of the popular fast charging protocols: QC 2.0, 3.0 and 4.0 (up to 12V), PD (similar to 12V), and MTK Pump Express.

Tests were carried out with a 25w load connected, as well as a PD trigger . Ripple tests were carried out separately on the DSO 138 oscilloscope .

The following results were obtained:

At 5V, the charger was able to deliver almost 0.5A more than stated, while the voltage did not actually decrease;

At 9V, the current strength was an impressive 2.5A (2.22A declared), while the voltage did not “sink”;

At 12V, the maximum current, which was almost 2A (remember that the manufacturer claims 1.67A), respectively, the total load was almost 23.5 watts. It should be noted that the voltage was 12V, and the charger could give out more, but most likely a threshold is set, after which the charger simply turns off (goes into protection).

When testing for ripple, the current is set, which the manufacturer declared for certain voltages (5, 9 and 12V). The charger passed the test with a bang, since the ripple was only up to 70 mV. The charger will not negatively affect the operation of the smartphone or tablet (example: phantom pressing on the sensor while charging).

Heat

The operating mode was tested at a load power of 20 watts (voltage 12V and current strength 1.66–1.67A), for 30 minutes, after which the temperature in the warmest place was 38 degrees. This is a great result for such power.

Conclusions

The most universal (support for fast charging for Apple technology, as well as devices supporting QC 2.0, 3.0 and 4.0, PD, as well as MTK Pump Express), which is suitable for most devices. It should also be noted that the charger is capable of delivering more than stated, the ripple during operation was insignificant, as was the temperature of the charger itself.

Ugreen 20W SV137 on Store

That’s all for me, thank you all for watching!