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Small rectangular USB male to 5.5 x 2.1mm female power adapter in black plastic and metal

eForChina

eForChina USB Male to 5.5 x 2.1mm Female Adapter

SKU CH-4HBK-SR857

Connects a 5.5 x 2.1 mm barrel plug to a USB port for power in a compact 50 x 18 x 12 mm PC-and-metal body weighing 10.5 g

  • Adapter typePower Adapter
  • Compact adapter connects 5.5 x 2.1 mm power plugs to USB ports
  • Tiny 50 x 18 x 12 mm body slips into any laptop bag
  • Lightweight 10.5 g design adds virtually no bulk to your kit
  • Durable PC and metal housing withstands daily plug cycles
  • Simple gender changer lets you power 5.5 x 2.1 mm devices from USB

USB Male to 5.5 x 2.1mm Power Adapter

This adapter converts a standard USB male port into a 5.5 x 2.1mm female barrel jack for powering small devices. The compact housing measures about 50 x 18 x 12 mm and weighs roughly 10.5 g. It is built from PC plastic and metal for durability. The changer type is listed as a Power Adapter.

Ideal for Portable Power Connections

Suits users who need to run a 5.5 x 2.1mm DC device from a USB power bank or laptop port while travelling. Not for buyers who require a different barrel diameter or a USB-C input connector. Builders needing higher current delivery than a standard USB port provides should look at a dedicated power supply.

5.5 x 2.1mm Barrel Jack Compatibility

The single specification that decides fit is the 5.5 mm outer diameter and 2.1 mm inner diameter of the female socket. Your device must use exactly this barrel size for a secure connection. Verify the tip polarity and voltage requirements of your equipment before use.

How it compares

Measured against everything we stock in Other Adapters & Couplers, at today’s prices. Recalculated every night.

Price $5.99
Cheaper than about 92% of the 1,761 comparable items (median $18.99).

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Specifications

Product
Adapter typePower Adapter

Questions about this item

What voltage or current does the USB male to 5.5 x 2.1mm female adapter support?

The adapter passes standard USB power; the 5.5 x 2.1 mm barrel accepts the voltage and current your USB port or charger provides.

Will the 50 x 18 x 12 mm adapter block adjacent ports on my laptop?

At roughly 50 mm long, 18 mm wide and 12 mm thick, it sits close to the chassis and rarely obstructs neighbouring sockets.

How do I connect the adapter without reversing the barrel polarity?

Insert the USB male end into the host, then plug the 5.5 x 2.1 mm barrel into the device ensuring the centre pin matches the device’s positive terminal.

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