USB 5V to 12V Step-Up Boost Cable – 2.1x5.5mm DC Adapter

Power Your Router or Switch from Any USB Port

The USB 5V to 12V Step-Up Power Boost Cable lets you run 12V-rated networking devices — routers, ADSL modems, switches, and optical modems — directly from a standard 5V USB power source. No bulky wall adapter needed. The built-in boost module automatically steps up the 5V USB input to a stable 12V DC output at up to 1A, making it a clean, compact solution for home, office, or travel setups. Made in Mainland China.

Key Features

• Built-In Boost Module: Converts USB 5V input to a steady 12V DC output (0.8–1A) — no external circuitry required.
• Universal 5.5×2.1mm DC Plug: Fits the standard barrel connector used on most routers, switches, ADSL modems, and optical modems.
• Broad Compatibility: Works with any brand of router, switch, or modem as long as the device requires 12V and draws no more than 10W.
• Quality Conductors: Features 12-strand 0.1mm national-standard copper wire for reliable, low-resistance power delivery.
• Durable PVC Build: Flexible PVC jacket in all-black finish; 1-metre length gives you plenty of reach.
• No Assembly Required: Plug-and-play — simply connect the USB end to your power bank or USB charger and the DC plug to your device.

Specifications

Purchasing Guide

1. Check the voltage label on the bottom of your router, switch, or modem. Select a 5V cable for 5V devices, 9V for 9V devices, and this 12V cable for 12V devices.
2. Confirm your device's DC barrel plug diameter. This cable uses a 5.5mm outer / 2.1mm inner plug — the most common size. If your device has a 3.5mm plug (headphone-jack size), you will need an adapter head.
3. Verify your device's power draw does not exceed 10W. If it does, this cable is not the right fit.

What's in the Box

• 1× USB 5V to 12V Power Boost Cable (5.5×2.1mm DC plug)

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Frequently Asked Questions

Q: Can I use this USB 5V to 12V boost cable with any router brand?

A: Yes. This boost converter cable is brand-agnostic. It works with routers, ADSL modems, switches, and optical modems from any manufacturer, provided the device is rated for 12V DC input and its power consumption does not exceed 10W. Always check the label on the bottom of your device before use.

Q: What USB power source do I need to drive this cable?

A: Any standard 5V USB power source will work — including USB wall chargers, power banks, or USB ports on computers. For best performance and to reach the full 1A output, use a USB charger rated at 2A or higher so the source can comfortably supply the current the boost module needs.

Q: Does the 5.5×2.1mm DC plug fit my device?

A: The 5.5mm outer / 2.1mm inner barrel connector is the most widely used DC plug size for routers and networking equipment. To confirm compatibility, measure your device's DC power port or check its documentation. If your device uses a 3.5mm plug (the same size as a headphone jack), you will need a 3.5mm adapter, which is sold separately.

Q: Will there be any voltage instability at the output?

A: The built-in step-up (boost) module is designed to deliver a stable 12V output between 0.8A and 1A. For best stability, keep the connected device's power draw under 10W and use a quality 5V USB source rated at least 2A.

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.