DROK USB to 9v, 5v to 12v Step Up, USB Cable DC 5V Boost to 9V 12V Voltage Converter 1A Step-up Volt Transformer Power Regulator Line with LED Display

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.

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 bought this so that I could use my phone backup battery bank with my radio. It has a finnickey power-on sequence that needs experimentation. In short, I power on the battery bank at nearly the same moment I power on my HAM radio. Also, it does not provide enough power for transmit on the 2 highest power settings, but does work on the 2 lowest transmit power settings. I'll just use a bigger antenna if I anticipate needing it. Too bad nobody makes one that provides enough current for the higher power levels. Maybe one will come along in the future, I'll be on the lookout for it.

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 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.

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.

Used this to charge an FT5D radio, which needs a 12 volt power source. Works well with portable USB power banks.

EXCELENTE PRODUCTO,