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

I picked up this DROK USB to 9 V/12 V step-up converter to power my TP-Link router (which requires a 9 V input) directly from a power bank when the grid goes down — and it works exactly as I hoped. Instead of scrambling for a wall outlet during power outages, I simply plug the USB end into my power bank, switch the converter to 9 V, and my router stays online. It’s been a reliable backup solution that keeps my Wi-Fi active when I need it most. ✔ What I liked • Reliable backup power: The converter consistently delivers stable 9 V output from a standard 5 V USB source, so my router stays connected through outages. This has given me peace of mind knowing my network won’t drop unexpectedly. • Easy plug-and-play setup: Just plug the USB end into a power bank, flip the converter to 9 V, and connect it to the router’s DC input. No additional adapters or complicated steps required — it works right away. • Clear voltage indicator: The built-in LED display shows the selected output voltage clearly, so I always know I’m supplying the correct power. • Compact and portable: It’s lightweight and small enough to stash with my emergency gear or travel kit, and the cable length is good for routing without strain. ⚠ What to know • The output tops out around 1 A at 9 V, so it’s important to make sure your device’s power draw stays within that range — in my case, the TP-Link router runs perfectly well on this. • Best suited as a backup or temporary power solution (e.g., during outages or when on the go), rather than a full-time substitute for a dedicated power supply. ⭐ Final Verdict This USB-boost converter is a simple, effective way to run a 9 V device from a USB power source like a power bank. It gave me exactly the backup power solution I needed to keep my router online during outages, and the easy setup with a clear voltage display makes it very user-friendly. ✔ Highly recommended if you want a reliable backup power option for routers and other small 9 V devices.

Works great

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.

Product quit working after only a couple of days. It is now only outputting 5V and the little block gets quite warm to the touch.

Works great. I use it to power a 9v TP link router with a USB power bank. And it's nice to know i can also use it for 12v if i ever need it.

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 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!