USB 5V to 12V/9V/8.4V Step-Up Power Adapter Cable 5.5x2.1mm

$6.98 $9.65

USB to DC Step-Up Power Adapter Cable – Power More with Your Power Bank

This compact USB DC 5V to 8.4V/9V/12V Step-Up Adapter Cable lets you convert any standard 5V USB power bank or USB port into a higher-voltage DC power source. With a 5.5mm x 2.1mm male barrel plug, it's compatible with a wide range of 8.4V, 9V, or 12V devices — making it an essential accessory for travelers, hobbyists, and everyday users.

What Can You Use It For?

Power a Wi-Fi router from a USB power bank during outages or travel
Run a car air purifier using a portable power bank
Supply DC-powered electronics, LED strips, and small appliances on the go
Ideal for camping, travel, and emergency backup power situations

Key Specifications

Cable Type: USB (Type-A Male) to DC 5.5mm x 2.1mm Male
Input Voltage: DC 5V (USB)
Output Voltage: DC 8.4V / 9V / 12V (select your required option)
Output Plug: 5.5mm x 2.1mm barrel jack (male)
Cable Material: PVC
Cable Length: 1 metre / 39.37 inches (approx.)
Feature: Built-in step-up (boost) converter — no external module needed

Why Choose This Adapter Cable?

Forget bulky adapters and wall sockets. This all-in-one boost cable integrates the step-up circuitry directly into the cable itself, keeping your setup clean and portable. The durable PVC jacket protects against everyday wear, while the universal 5.5x2.1mm barrel connector fits the most common DC-powered devices.

Made in Mainland China.

Package Contents

1 × USB to DC 5.5x2.1mm Step-Up Power Cable

Note: Due to monitor/screen settings, colors may appear slightly different from the actual product. Please allow minor dimensional variation due to manual measurement.

Frequently Asked Questions

Q: What devices are compatible with this USB to DC step-up cable?

A: Any device that accepts a standard 5.5mm x 2.1mm barrel plug and operates at 8.4V, 9V, or 12V DC — such as routers, car air purifiers, LED controllers, and small 12V electronics — is compatible. Simply choose the correct output voltage variant when ordering.

Q: Do I need any additional hardware to use this step-up cable?

A: No. The boost converter is built directly into the cable. Just plug the USB end into any 5V USB power source (power bank, USB charger, laptop port) and connect the barrel plug to your device — no external module or adapter required.

Q: Can this cable work with any USB power bank?

A: Yes, it is designed to work with standard 5V USB output power banks. Ensure your power bank can supply sufficient current for your device — higher-wattage devices may require a power bank with a higher amp output (typically 2A or more recommended).

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.