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Small power adapter, 5.5 by 2.1 mm female to square male plug

eForChina

eForChina 5.5x2.1mm Female to Small Square Male Power Adapter

SKU CH-9HPB-51AH3

Converts a 5.5x2.1mm female power jack to a small square male plug for laptop charging

  • Adapter typePower Adapter
  • Converts 5.5x2.1 mm female to small square male plug
  • Brand-new adapter built for reliable power delivery
  • Compact and lightweight design fits in any bag
  • Second-generation male interface ensures secure laptop connection
  • Simple gender-changer solves mismatched barrel-jack problems

Purpose and Audience

This eForChina power adapter converts a 5.5x2.1mm female barrel connector to a small square second-generation male plug. It suits users who need to connect a standard barrel power source to a laptop or device requiring the smaller square interface.

Build Integration

The adapter adds a compact, lightweight link between the power supply and the device without requiring internal changes. It frees the builder from sourcing a dedicated brick with the proprietary square tip while keeping the existing cable run intact.

Sustained Operation

Under continuous load the passive connector maintains a stable electrical path because it contains no active circuitry that could overheat. Its simple metal contacts and moulded housing deliver consistent conductivity as long as the mated plugs remain fully seated.

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

How long can the 5.5×2.1 mm female jack handle continuous current before it overheats?

The adapter is a passive connector with no active cooling, so sustained load is limited by the cable and power supply ratings rather than the jack itself.

Does the adapter generate any audible noise or heat during all-day operation?

It has no fan or electronics, so it runs silently and stays at ambient temperature under normal use.

Which power brick tip must I already own for this adapter to work?

You need a charger with a 5.5 mm outer diameter and 2.1 mm inner diameter male plug.

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