5.5x2.1mm DC Power Plug Adapter – IBM HP Lenovo ThinkPad

5.5x2.1mm DC Power Plug Adapter – Round Jack to Square Connector

Tired of incompatible charging connectors? The OULLX 5.5x2.1mm DC Power Plug Adapter bridges the gap between standard round barrel jacks and the square-end connectors used on IBM, HP, and Lenovo ThinkPad laptops. A compact, no-fuss solution that plugs right in — no tools, no assembly, no hassle.

Whether you're setting up a universal laptop charging station or need a reliable DC converter for your workstation, this adapter delivers a secure, stable connection every time. Each unit is pre-tested before shipping to ensure reliable performance out of the box.

Made in Mainland China.

Key Features

• Universal Compatibility: Designed for IBM, HP, and Lenovo ThinkPad laptops — works with most universal laptop power adapters
• Female Jack: 5.5mm x 2.1mm round barrel input
• Male Connector: Square-end DC output with pin, matching ThinkPad-style ports
• Pre-Tested: Every unit is quality-checked before sale for reliable, consistent connectivity
• No Assembly Required: Plug and play — ready to use immediately
• Compact Design: Lightweight and portable — toss it in your laptop bag without a second thought
• No Harmful Chemicals: Free from high-concern substances

Specifications

What's in the Box

• 1 × DC Power Plug Adapter (Round Jack to Square End)

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Frequently Asked Questions

Q: What laptops is this DC power plug adapter compatible with?

A: This adapter is specifically designed for IBM, HP, and Lenovo ThinkPad laptops that use a square-end DC power connector. It works with most universal laptop chargers and power supplies that have a standard 5.5mm x 2.1mm round barrel output.

Q: Do I need any tools or technical knowledge to use this adapter?

A: Not at all! This is a true plug-and-play accessory. Simply connect your power adapter's round barrel jack (5.5mm x 2.1mm) to the female end of this converter, and plug the square male connector into your compatible laptop. No assembly or special skills required.

Q: Is this adapter pre-tested for quality?

A: Yes — every unit is tested before sale to ensure a stable, secure DC connection, so you can be confident it will work reliably straight out of the package.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.