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Small black cylindrical DC adapter with 5.5 by 2.1 mm female socket and 7.9 by 5.5 mm male plug

Ruth's sister

Ruth's sister 240W 5.5 x 2.1 mm to 7.9 x 5.5 mm DC power adapter

SKU CH-EN7M-VRDPN

Converts a 5.5 x 2.1 mm DC jack to a 7.9 x 5.5 mm plug for laptop power supplies up to 240W

  • Delivers up to 240 W for demanding laptops
  • 5 mm × 2.1 mm female fits common barrel plugs
  • 9 mm × 5.5 mm male matches larger laptop inputs
  • Converts connector size without changing voltage or polarity

DC power adapter for laptop charging

This adapter converts a 5.5 x 2.1 mm female DC jack to a 7.9 x 5.5 mm male plug. It supports up to 240W power delivery for compatible laptops. The connector change lets you use an existing power supply with a different input size. It is a passive component with no active electronics.

Passive connector — no thermals or fan noise

As a passive adapter it generates no heat of its own and produces no audible noise. Power draw is determined entirely by the attached laptop and power supply. No cooling or power management features are present.

How it compares

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

Price $9.99
Typical for this category: the median of 1,208 items is $9.99.

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Specifications

No published specifications for this item yet.

Questions about this item

How do I connect the 5.5 x 2.1 mm female end to my laptop charger?

Plug the charger tip firmly into the 5.5 mm outer and 2.1 mm inner female socket until it seats fully; the step often missed is checking polarity alignment before powering on.

Will the 7.9 x 5.5 mm male tip wear out and need replacement?

The solid brass male tip resists wear under normal use; replacement is only needed if the 7.9 mm outer or 5.5 mm inner contacts become bent or corroded.

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