Now that the mobile phone screen is getting bigger and bigger, running electricity is getting faster and faster, and it really needs a very convenient charge. So now with the USB charging plug products are also more and more, here to share with you under the small U upgrade version of the plug !
The packaging is packaged in a kraft carton, one side marked with "Product Liability Insurance 8 Million"; the other side is marked with the product name: Small U Upgraded Version and Model Number: SST307.
Open the box, there is a socket and a warranty card (three-year warranty!), very simple, the row insert also includes a plastic sleeve erosion.
Looks like the previous small U (2 hole USB), of course, USB hole increased to 4, the length of the plug is about 25cm, pure white is still very wild
The row plugs are equipped with three groups of new national standard combination five-hole jacks, compatible with two holes and three holes, and the hole spacing is also relatively wide. However, there is no built-in protection against electric shock in the jacks, in addition to the three groups of jacks are not too much, can not connect too many electrical appliances, more suitable for a small amount of desktop equipment.
The switch is a round-shaped button, and the individual feels slightly tight, and the intensity of the pressing needs to be slightly larger.
The number of 4 USB ports, "Tian" type distribution, there are still some space, the maximum output specification reaches 5V/3.1A, which is also the biggest upgrade compared to the previous product.
The front is actually slightly frosted and the sides are smooth.
The insert shell is divided into two layers. The two layers of joints are concave, and the work is acceptable.
At the bottom of the row, there are two wall hook designs that can be used on the wall. However, there are no non-slip mats and you should pay attention to the desktop.
The following parameter nameplate, rated voltage 250V, rated current 10A, maximum support 2500W power load, mainstream level, general use is no problem.
Wire, the length of 1.8 meters
Wire specifications are 53 (RVV), 300/500V, 3 X 0.75mm2, GB/T 5023.5-2008.
AC plug head
Turn on the switch and a small blue light will illuminate on the right. There is also a blue circle around the circular switch.
The fixing screws are four triangular screws, obviously do not want to be easily opened, of course not hard for me
Open slightly! The internal is divided into micro switch, one copper sleeve and USB output module.
The solder joints of the switches are still good, and no excess metal parts of the wires are exposed, but the wires are not well understood.
It is a one-piece copper plug, reducing solder joints, improving electrical conductivity, and reducing heat generation.
Plug-in USB output module
Take a look at the front: transformers, solid capacitors, electrolytic capacitors, solid capacitors and switches, fuses, after all, HuntKey is to do PC electromechanical products, the basic work is still not bad.
Below to measure USB power it! Test Tools: Power Meter, USB Current Detector, and USB Load Resistors
No-load power consumption 0W
Load resistors are adjusted to 1A and 2A loads respectively to see the voltage and current
1A load: output voltage 5.06V, current 1.03A
2A load: output voltage 5.00V, current 1.99A
The two interfaces have 1A load, and the currents of the two interfaces are 1.02A.
One interface has 1A load (blue detector inserted), one interface is 2A load (white detector), 1A load is 1.02A, and 2A load is 1.96A.
After all, the test tool may also have some errors, basically reaching the 3.1A standard.
2 interfaces with 2A load, respectively, overloaded, voltage dropped to 4.5v, current 1.75A, do not want to have more than the performance of the specifications
Looking at the actual charging situation, the input current is determined by the device itself. It does not mean that you cannot run full of 3.1A.
70-80% of cell phone power, current is 0.73A
Less than 10% battery power, current 1.02A
Charging treasure, the current is 0.87A
7-inch tablet, electricity is not to 10%, the current is 1.10A.
HuntKey, as a veteran electromechanical manufacturer, should have no problem in producing plug and socket electrical. The total output of 5V/3.1A is not a problem for general applications, but some entangled problems are four USB ports but only 3.1A from above. According to the mobile phone tablet product, if the battery power is relatively low, the charging current can reach 1A or more. If 4 such low-power devices are connected to 4 USB interfaces, it will certainly be shunted, and it will be somewhat unpleasant (well, there are 4 interfaces ). Of course, I think that when it comes to actual use, it should not be full. If you do not entanglement this issue, small U upgrade version is still good.