USB 5V to 12V/9V Boost Power Cable – 5.5x2.1mm DC Converter

$11.43 $13.43

Power Your Router, Modem & More from Any USB Power Bank

Tired of hunting for a wall outlet to run your router, modem, WiFi extender, or small fan? This compact USB DC Step-Up Boost Power Cable converts your standard 5V USB output (from a power bank, laptop, or USB charger) up to 12V or 9V DC — delivered via a 5.5×2.1mm barrel connector. It's the ideal portable power solution for travel, emergency backup, or off-grid setups.

Made in Mainland China.

Key Features

Step-Up Boost Conversion: Efficiently boosts a 5V USB input to a stable 9V or 12V DC output (select the voltage that matches your device).
Universal 5.5×2.1mm Barrel Plug: Compatible with most routers, modems, WiFi repeaters, small fans, and other 12V/9V DC-powered devices.
USB-A Input: Plugs directly into any standard USB port — power bank, wall adapter, car charger, or laptop USB port.
Compact & Portable: Lightweight cable design — toss it in your bag and stay connected anywhere.
Stable Power Output: Built-in boost converter circuit ensures consistent, regulated voltage delivery to protect your devices.
Wide Compatibility: Works with routers, modems, WiFi adapters, small cooling fans, LED strips, and more that run on 9V or 12V DC.

Specifications

Input: USB-A (5V DC)
Output: 9V DC / 12V DC (select variant)
Connector: 5.5mm outer diameter × 2.1mm inner pin barrel plug
Type: Step-Up Boost Power Cable
Country of Origin: Mainland China

Perfect For

Running a router or modem from a power bank during outages
Powering WiFi extenders in locations without a nearby outlet
Supplying 12V to small fans or LED devices via USB
Travel, camping, emergency preparedness, and off-grid connectivity

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Frequently Asked Questions

Q: What devices are compatible with this USB step-up boost power cable?

A: This cable is compatible with any device that operates on 9V or 12V DC and uses a standard 5.5×2.1mm barrel connector — including most home routers, modems, WiFi repeaters, small desk fans, LED strips, and other low-power DC electronics. Always verify your device's voltage requirement before use.

Q: Can I use this cable with a regular power bank?

A: Yes! The cable is designed to plug into any standard USB-A port, including power banks, wall adapters, car chargers, and laptop USB ports. The built-in boost converter steps the 5V USB output up to your required 9V or 12V, so you can power your devices without a wall outlet.

Q: Is the 5.5×2.1mm barrel connector the right size for my router?

A: The 5.5mm outer / 2.1mm inner barrel connector is the most widely used DC power connector for consumer routers, modems, and networking equipment. Check your device's power port size before purchasing to confirm compatibility. If your device uses a different barrel size, it may require an adapter.