Vinsic 20,000mAh QC3.0 Powerbank
I bought this portable charger for a friend who was looking for a high capacity powerbank that had USB-C port for both input and output, and also microUSB input with QC capability. I was searching on AE during the 11.11 sale and saw this vinsic below $30 and thought it was a good deal. It also arrived really quick since the stock was in the US warehouse.
Because it isn’t mine to keep, this review won’t have the extensive discharge tests I normally do in my reviews, it will instead have the two most important and common discharge rates for both 5V and 9V.
Manufacturer specifications:
-Capacity: 20,000mAh
-USB output 1: 5V/2.4A
-USB output 2: 3.5V/2.4A 5V/2.4A 9V/2A 12V/1.5A
-USB-C in/out: 5V/3A
-MicroUSB input: 9V/2A
-Dimensions: 158*83*25mm
-Purchased from: Page Not Found - Aliexpress.com
Can be found on Amazon as well: https://www.amazon.com/Vinsic-20000mAh-External-Portable-Smartphones/dp/B01M0J5N37/
Unboxing:
Front of the box
Some info on the back
A brown box inside with the contents: 2ft USB cable, manual, powerbank.
Solid construction and it feels very substantial. The body is made from plastic and the top silver part is actually aluminum, should help with heat dissipation.
Compared to other large capacity powerbanks: Aukey 30,000mAh, Anker 26,800mAh, Vinsic 20,000m
Ah, Xiaomi 20,000mAh. The vinsic is surprisingly large in size for its capacity, actually bigger than the Aukey 30Ah, just not as thick.
Stacked in the same order, see the vinsic is not slim either.
Top view of the ports, from left to right: 5V Out, QC Out, 5V USB-C in/out, microUSB in, percentage display. When the powerbank is off, the display is not visible at all.
The bottom has some info, but is missing a crucial information: energy rating (Wh).
Operation and performance
Operation is very simple, and this unit doesn’t even have a physical button. Instead it uses a touch sensitive panel on the display for capacity check/manual turn on.
-By connecting any device (with load or not) it will automatically turn on.
-After 20 seconds if a load is not detected it will shut down.
-You can manually turn on the powerbank by touching the display.
-Display has a 10 second timer when charging and will remain on when recharging.
Testing various devices
When doing tests on a powerbank it is much different to use a USB load than a real device. Most of the times a dummy load will force the powerbank to put out certain power while in a real world situation it will not do the same with a phone or other devices. My devices for this test each have certain characteristics when it comes to drawing power:
-iPhone 7: Charges up to at 2A, but limited to 1A if the coding is not correct.
-YZXstudio 8th Gen powerbank: will automatically detect the output and switch to highest possible charging voltage (12V).
-Aukey 30,000mAh powerbank: draws exactly 5V 2.4A if the coding is correct, 2A if not.
Results:
-iPhone7: Charged fine in USB1, but was limited to 1A in the QC port. Using the top port of my YZXstudio 1270 meter the coding was fixed and it jumped to 2A. Not good.
-YZXstudio powerbank: 5V/2A in USB1 and 12V/2A in the QC port. :+1:
-Aukey powerbank: Limited to 5V/2A in USB1 but charged fine at 5V/2.4A in QC port.
The included USB cable is 2ft long, and was measured 0.124Ohms with 0.25V loss at a 5V/2A load. My best USB cable is 6in long and measures 0.07Ohms, so I will say the included cable is very good for its length.
Discharge tests
Equipment used for the discharge tests are YZXstudio 1270 meter and ZL1000 load. Because this is a quick review only the 2 most important tests were done: 5V/2A and 9V/1.5A. Most modern phones will charge at this rate or below.
Results:
Notes
-It clocked 85.4% efficiency for 5V/2A and 83.4% for 9V1.5A, which puts it in the “good” rating. Above 85% I would call it very good and above 90% is excellent.
-Using a QC3.0 charger the max charge rate was 9V/2A and it took only 5hr 10min to fully charge. This is very good time compared to my other powerbanks this capacity range.
-During the testing specially in 9V out the aluminium part was very warm to the touch, but this also means it is doing a good job dissipating the heat.
-Vinsic doesn’t specify the exact energy and the battery’s nominal voltage, I used 3.65V as an industry average and assumes 73Wh rated energy.
-USB-C port was not tested because I lack the equipment (for now).
Final words…
The good:
-Relatively inexpensive considering the in/out USB-C port. A very good deal if found under $30.
-Solid built quality, easy to use, the touch sensitive display provides useful information, but for some people it may look cheap.
-Good efficiency and flexible input/output options.
The bad:
-Abnormally large for its capacity.
-Coding is not as intelligent as I liked, you will have to use specific ports for specific devices. (e.g. use USB1 for your non-QC devices).
Thanks for reading and hope you find this review helpful. 