DROK USB to 12v Adapter - 5V to 12V Step Up Converter, Boost Converter Voltage Regulator with 5.5x2.5mm/3.5x1.35mm Ports and 1.2m Cable

This is exactly what I wanted to go from lower voltage to what is required by router from a power bank. This is my emergency backup ran off my phones mobile data if internet outage or electrical outage. Good build quality. Price seems fair and it met my needs and functions well. I can tell you the smaller adaptor fit my asus router.

Well made and works perfectly. Used to step-up the voltage from 5 to 9v for powering a security camera.

First off, I hate bright LEDs on power supplies and USB cables. The green led of this one isn't as bad some blue LEDs but it's still too bright. One star off for the bright LED.I'm using this to power a HDHomeRun Flex 4 tuner. It generally hovers around 12 volts and 0.8 amps. Tried a couple of 1 amp supplies and the tuner just didn't like them and I wouldn't get some of my local channels. Was looking for a higher amp USB power supply and couldn't find much out there. Guess 12v1amp is pushing the USB spec. Thankfully this one delivers 1.2 amps and HDHR tuner is fine with it.I'm using an Anker multiport USB power supply to power a RaspberryPi, USB antenna booster and the HDHR. The USB supply is designed for 3+ amps out each port at same time. So the DROK step up converter is doing fine. If your trying to power it with a cheap phone charger, your results may not be as good.My goal was to mount the antenna stuff, Pi and hard drive on small board and hand it on a wall in the garage. Not have it be an eye sore and still be compact. The DROK supply help to not have a wallwart blocking a power outlet.

I had high hopes. I really like this brand and have had good luck with other products from them, but not this one.I bought similar products from several brands then measured them for voltage regulation and ripple using an electronic load, scope and volt meter. This one was the worst performing of all of them.With 250mA load the voltage sagged about 300mA. The ripple was around 75mV with a nasty triangle top and square wave bottom, not even a rounded typical wave (discontinuous mode artifacts?) at about 400KHz. The competition was around 1mV PP rounded wave at 3MHz at a similar load with under 10mV of voltage sag.This might be good for non critical applications but clearly for anything that needs clean 9 or 12V there are way better products out there that do this for less $$$.

I got this to get rid of the wall wart power supply that came with my Shure GLXD16+ wireless system. Works great delivering power using a USB out on my power strip, cleans up my board. I recommend you verify the AMPs/Volts out on your USB device to ensure it matches this. Works for me!

I was looking for an accurate step-up converter to bring a 5V output from a power bank up to an even 12V. This converter from DROK does step-up the 5V output as I was wanting, but it doesn't convert to an even 12V like I was hoping. The converter says 12 on the LCD panel, but my Fluke meter sees 12.24 VDC. When the switch on the converter. is on 9V, my meter reads 9.26 VDC. I may not be able to use this for my particular application as a result. Luckily, the converter is just a few dollars which makes the loss easier to stomach.

I wanted something I could power my guitar pedal board with a simple battery powered USB pack so I can play anywhere without worrying about find a wall outlet. This served the purpose perfectly and has been rock solid. I glued the 9v / 12v switch into the 9v position so I don't accidentally over voltage my pedals and for this application you need a plug to reverse the polarity of the output plug. I also have a breakout cable to run multiple pedals off this one power supply. It produces a very quiet output voltage. The only issue I had was one of my USB Battery packs produced an audible hiss in its output that this supply did not filter, but that was the battery pack and not this supply. Works great and worth the price!

I found it hard to find a decent 5v USB to 12 converter. This one seems to work well so far. I have 3 of them, the open circuit output voltage ranges from 12.4 to 12.63 volts. Seems like a large range, but these are cheap devices, probably just a switching step up converter. I cannot say how much current I can draw out of them, but I started using one to power a device that draws about 3/4 amp, and in parallel with a LiON battery as backup this converter was able to run the device and slowly charge the battery. So I'm thinking it's capable of 1 amp or so. For now I'm using two of them in parallel (via Y cable), and yes this is probably not designed for by the manufacturer. As you would expect, open circuit you get the higher of the two converter voltages, then under 3/4 amp total load (in parallel) they dropped to 12.45 volts. Not bad in my application as the backup battery needs min of 12.3 volts to charge. They don't get very warm and have internal LED that is green with no load, and red with any load so you can see when some current is being drawn when the LED goes red. I did originally plan on putting a 47uF cap on the output of each one hoping to smooth out the output when in parallel in case somehow they interfered with each other, but that doesn't seem necessary so far especially with the backup battery serving the cap function. Hope this is useful info.