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USB-to-barrel boost cable, 5.5×2.1 mm plug, 39.37 in length

Ruth's sister

Ruth's sister USB 5V to 9V Boost Cable 5.5x2.1mm 39.37in

SKU CH-T46J-4858F

Boosts 5V USB power to 9V at 8W with a 5.5x2.1mm plug and 39.37in cable for routers, speakers or LED lights

  • Powers 9V devices from a 5V source via USB
  • Delivers 9V 8W output with 5V 2A input requirement
  • Built-in protection against over-current, over-voltage and short-circuit
  • 37in cable with 5.5x2.1mm positive-centre connector
  • Plug-and-play design keeps routers running during power cuts

What this cable does

This USB boost cable steps a standard 5 V 2 A source up to a regulated 9 V output through an integrated step‑up module. It is intended for users who need to run 9 V equipment such as routers, speakers or LED lights from a power bank or any USB port that can supply 5 V 2 A.

Connector and power limit

The cable terminates in a 5.5×2.1 mm barrel plug wired positive inside, negative outside, and the module delivers up to 8 W at 9 V. The source must provide at least 5 V 2 A, and the connected device must draw 0.8 A or less for reliable operation.

Heat, noise and efficiency

The step‑up circuit is built into the cable assembly so there is no fan and no audible noise during normal use. Power loss appears as modest warmth along the module body; the 1 metre (39.37 in) cable itself remains cool when the load stays within the 0.8 A limit.

How it compares

Measured against everything we stock in Worldwide Power Cords, at today’s prices. Recalculated every night.

Price $5.99
Cheaper than about 95% of the 1,208 comparable items (median $9.99).

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Specifications

No published specifications for this item yet.

Questions about this item

What does the 8W output mean when I plug this into my router?

The cable delivers up to 9V at 8W, so a router that draws .8A or less will run from a 5V 2A power bank or charger.

Does the USB end negotiate a higher voltage or just draw 5V?

It draws a fixed 5V 2A from the USB source and steps it up internally to 9V; no PD or QC handshake is used.

Will the 5.5x2.1mm plug fit my device's power jack?

The centre-positive 5.5x2.1mm barrel matches the common size on many 9V routers, speakers and LED lights; verify polarity before connecting.

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