USB HUB for Charger? Review of Selerwin 100W USB-C Expansion HUB
With the increasing power of chargers, 65W and 100W chargers have become very common, but most original chargers of your devices are only equipped with a single USB-C port, which means you cannot charge multiple devices at the same time. You can of course buy a multi-port charger, but the USB-C HUB we gonna show you today can save you a lot of money.
The input USB-C cable is attached to the back.
It is made of PVC rubber, which feels soft and smooth and very much like the Apple MagSafe Charger.
The USB-C connector is actually gold-plated, which can resist oxidation and be more durable, and the 100W is printed on it.
It adopts the 24 full-pin design.
The ChargerLAB POWER-Z KM003C shows it's a USB4 cable with E-Marker chip and can do 20V5A.
The length of this cable is about 1.5m (4' 11.05''), which is totally enough for daily use.
The diameter is about 4.1mm (0.16 inches).
And the white cable tie can shorten the cable length according to your needs.
Turn to the other side. The shell is made of fire-retardant PC. It has two USB-C and two USB-A ports.
When charging four devices at the same time, the maximum power of USB-A2 reaches 10W. USB-A1 + USB-C2 share 25W output. And the USB-C1 can be up to 65W, 100W in total. That is to say, it's designed for 100W single-port fast charger.
Just connect it to your charger, and the LED light will light up.
Four rubber pads at the bottom make it more stable when placed on your desktop.
The length of this USB-C HUB is about 90.5mm (3.56 inches).
The width is also about 45mm (1.77 inches).
And the height is 21mm (0.83 inches).
And the weight is about 125.5g (4.43 oz).
Since there are no input and buck modules inside. So, it's thinner and smaller than your charger.
You may also be curious about if this HUB will affect the charging protocol of the charger. So, we will use this nubia deuterium charger to do both the protocol test and the charging compatibility test.
The ChargerLAB POWER-Z KM003C shows the USB-C1 supports FCP, SCP, AFC, QC3+, SFCP, MTK, PD3.0, PPS, QC5 protocols.
It also has five fixed PDOs of 5V/9V/12V/15V 3A, 20V 5A and a set of PPS. It means the charging protocol of the USB-C port depends on the charger.
The PD protocol of USB-C2 drops to 20W and QC5 becomes QC4+.
Compared to USB-C1, the voltage has not changed, but the current has been reduced.
The USB-A1 supports FCP, SCP, AFC, QC3.0, SFCP protocols.
And USB-A2 only supports DCP protocol.
Charging Compatibility Test
First of all, because this device needs to be used with a charger to function properly, let's start by discussing the compatibility at the input end and see which mainstream chargers in the market it can work with.
Taking the UGREEN 140W high-power charger as an example, when connected, the USB-C1 port on the HUB can support a 100W output without issue, suitable for charging laptops and other devices.
By compiling a list of popular PD chargers in the market with a power rating of 65W or higher, it can be observed that the USB-C1 port can achieve or come close to the specified output power. However, for certain brands that primarily use proprietary protocols for their chargers, such as Xiaomi and OnePlus, the ideal performance cannot be achieved.
Next is the output end, keep in mind, we still going to use that same nubia deuterium charger to do the test.
For example, use the USB-C1 port of this setup to charge the Black Shark 5 Pro.The power is 17.91V 4.95A 85.06W, triggering the PD fast charging protocol.
We have compiled the data of all the tested models using the USB-C1 port into a table. It can be observed that the majority of phones trigger the 9V PDO, while gaming consoles and tablets reach up to 15V. On the other hand, laptops consistently reach 20V.
The USB-C1 has the best compatibility and the highest power. But if the power of the charger you use is above 100W, it will be limited to below 100W by this HUB.
Moving on the USB-C2. It can provide 9.00V 1.92A 17.31W to the OPPO Find X6 Pro.
Among the tested phones, except for two Huawei and Black Shark models that only triggered the 5V PDO, all others were consistent at 9V.
The USB-C2 supports 20W PD and various protocols. So, most devices can be charged at 9V2A 18W.
Next is the USB-A1 port, it can only charge the Xiaomi POCO F4 GT at 8.83V 1.52A 13.44W.
Just like the USB-C2 port, the PDO is basically 9V across the board.
And the USB-A1 does not support PD, but most devices can be charged through QC protocol. The charging power is around 17W.
Finally we have the USB-A2 port, this time, it can only provide the same Xiaomi phone with 4.94V 1.52A 7.50W .
And the PDO dropped to 5V.
Since the USB-A2 only supports DCP protocol. The maximum power is only 10W.
Then, let's check the charging performance of each port when charging multiple devices.
When charging four devices at the same time, USB-C1 can reach 60W, and the charging voltage of the other three ports is 5V. The maximum total output power won't exceed 100W.
The USB-C1 also exceeds 60W when charging three devices at the same time, and the USB-C2 reaches 17W. The USB-A only reaches 5-6W.
When charging two USB-C devices, USB-C1 maintains the previous charging power, while the power of USB-C2 is increased to 20W.
Although it looks very much like the charging dock of your USB-C laptop, it is only suitable for chargers and other charging devices. You can use it to charge your laptop, but there's no way to use your laptop to charge other devices via this HUB.
Full Charging Test
Next, let's try to charge the 13-inch MacBook Pro M2 with the USB-C1 of this HUB.
The voltage is around 19-20V throughout the test. The peak power is 55W and lasts for 5 minutes. Then, it'll gradually drop to 36W. From 1 hour and 30 mins, it drops to almost 0 without hesitation. The total charging time is about 2 hours and 34 mins.
You can check its charging speed more intuitively through this chart. It reaches 50% in 45 mins and 80% in 1 hour and 28 mins. It takes 2 hours and 34 mins to be fully charged. The charging speed is almost the same as a 65W PD charger.
When testing the full charging curve, we put this HUB into a 25°C (77℉) thermotank and got its surface temperature after an hour.
Under 220V 50Hz, the maximum temperature on the front is 52.5°C (126.5°F).
And 52.7°C (126.86°F) on the back.
Under 110V 60Hz, the maximum temperature on the front is 51.3°C (124.34°F).
And 53.4°C (128.12°F) on the back. The corresponding USB-C1 is the hottest spot.
Since there's no switching power supply inside, its overall temperature is lower than high-power chargers, at around 52°C (125.6℉). The IEC 62368 specifies that the maximum temperature of plastic cannot exceed 77°C (170.6 ℉). So, it complies with the standard.
Summary of ChargerLAB
Well, that’s all tests for this USB-C HUB from Selerwin. Unlike most hubs for your USB-C laptop, this one is specially designed for USB-C chargers above 45W or USB-C charging ports in your electric vehicle.
It can easily turn your single-port charger into a multi-port charger. In the conversion process, the charging performance of the original charger won't be reduced and the temperature is controlled very well.
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