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Small black DC power adapter with 5.5 x 2.1mm male plug and 5.5 x 2.5mm female socket

eForChina

eForChina 240W 5.5 x 2.1mm Male to 5.5 x 2.5mm Female Adapter

SKU CH-9AP4-QHVCZ

Converts a 5.5 x 2.1 mm male plug to a 5.5 x 2.5 mm female socket for 240 W DC power

  • Changer TypePower Adapter
  • Connects 5.5 mm 2.1 mm power plugs to 2.5 mm sockets
  • Handles up to 240 W for high-draw devices
  • Compact form fits in any laptop bag
  • Plug-and-play design needs no drivers or tools
  • Adapts barrel connectors without soldering or cable replacement

Power adapter for barrel-plug devices

This adapter connects a 5.5 x 2.1mm male power source to a 5.5mm x 2.5mm female input, allowing mismatched barrel connectors to work together. It supports up to 240W of power delivery for compatible DC devices. The compact form factor makes it practical for travel or permanent installation in tight spaces. Users needing to bridge this specific connector combination will find it a direct solution.

Sustained load behaviour

The unit is rated for 240W continuous operation, so it handles steady power draw without the derating common in peak-only specifications. No active cooling is present, so adequate airflow around the adapter helps maintain stable temperatures during prolonged use. Voltage drop across the short internal path remains minimal at the rated current. Builders should verify their power supply and device stay within the 240W limit to avoid overheating.

Installation notes

Connection is plug-and-play with no drivers or configuration required; simply insert the male end into the source and the female end into the device. The small housing can make gripping difficult if ports are recessed or tightly spaced, so check clearance before purchasing. Polarity follows the standard centre-positive convention, but always confirm both ends match your equipment. The adapter adds no cable length, so the power brick must reach the device directly.

Highlights

  • Connects 5.5 mm 2.1 mm power plugs to 2.5 mm sockets
  • Handles up to 240 W for high-draw devices
  • Compact form fits in any laptop bag
  • Plug-and-play design needs no drivers or tools
  • Adapts barrel connectors without soldering or cable replacement

Specifications

Changer TypePower Adapter

Questions about this item

Does the adapter get warm when delivering 240 W continuously?

It is a passive plug with no active cooling; sustained 240 W loads may cause noticeable warmth at the connectors.

What barrel-jack sizes must my existing power brick and device already have?

Your power supply needs a 5.5 x 2.1 mm female jack and your device needs a 5.5 x 2.5 mm male jack.

Will this work with a legacy laptop charger that uses a 5.5 x 2.5 mm tip?

Yes — the adapter converts a 5.5 x 2.1 mm source to the 5.5 x 2.5 mm tip required by older chargers.

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