Lenovo 4X20E50558 ThinkPad 170W Slim Tip AC Adapter

Lenovo 4X20E50558 – High-Capacity Power Adapter for Performance ThinkPads

Overview

The Lenovo 4X20E50558 is a high-output 170W AC power adapter designed to meet the rigorous energy demands of high-performance ThinkPad laptops and mobile workstations. It solves the issue of power throttling during intensive tasks by providing a consistent, high-wattage power supply that ensures both system operation and battery charging simultaneously, even under maximum load.

This adapter features the proprietary Lenovo "Slim Tip" rectangular connector, which is more durable and less prone to pin damage than traditional round barrel connectors. It is an ideal replacement or spare power supply for users who frequently move between home and office or for those utilizing docking stations that require a dedicated 170W input. The unit is designed with a compact form factor for its power class, making it relatively portable for mobile professionals.

Deployment is specifically intended for power-hungry models within the ThinkPad P series and high-end T series, as well as several Legion gaming laptops. It incorporates energy-efficient circuitry and is backed by Lenovo's enterprise-grade safety certifications, protecting hardware against power surges and thermal overloads. This adapter is not compatible with newer USB-C only charging systems or older round-tip ThinkPad models.

Key Features

• 170W output supports workstations with dedicated graphics and high-TDP CPUs

• Proprietary Slim Tip connector ensures a secure and durable power connection

• Energy-efficient design meets official environmental and safety standards

• Compact "brick" design for improved portability compared to older 170W models

• Compatible with a wide range of ThinkPad docking stations and performance laptops

Technical Specifications