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Black 7.9 by 5.5 mm DC 20V power adapter connector for Lenovo ThinkPad

Ruth's sister

Ruth's sister 7.9*5.5mm DC 20V internal power cable

SKU CH-JYZ5-XBZWF

A 7.9 by 5.5 mm DC 20V connector cable for Lenovo ThinkPad power adapters

  • 9 × 5.5 mm plug fits Lenovo ThinkPad power ports
  • 20 V DC rating matches original adapter specification
  • Carbon converter connector ensures stable power delivery
  • New condition guarantees reliable internal connection

7.9×5.5 mm DC 20 V power cable

This internal cable carries a 20 V supply through a 7.9 mm by 5.5 mm barrel connector. It is built for ThinkPad models that use this exact tip size and voltage. The carbon converter design provides a secure fit inside compatible laptops. Buyers who need a different tip diameter or voltage cannot use this adapter.

Practical limits of the barrel interface

The connector geometry locks the cable to systems expecting a 7.9 mm outer and 5.5 mm inner diameter at 20 V. Polarity and pin depth must match the host device or the laptop will not charge. No data or signalling lines are present on this power-only interface. Installers must verify the laptop’s original adapter specifications before fitting.

Highlights

  • 9 × 5.5 mm plug fits Lenovo ThinkPad power ports
  • 20 V DC rating matches original adapter specification
  • Carbon converter connector ensures stable power delivery
  • New condition guarantees reliable internal connection

Specifications

No published specifications for this item yet.

Questions about this item

Which connector size matches my ThinkPad's 7.9*5.5mm DC input?

This cable uses a 7.9 mm outer and 5.5 mm inner diameter barrel that plugs directly into ThinkPad models requiring that exact 20 V DC jack.

What does the 20 V rating mean when the cable is installed inside the laptop?

It carries the 20 V DC output from the internal power board to the system, so the voltage at the motherboard matches the adapter's rated supply.

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