Lenovo 4X21J81436

Overview

The Lenovo 4X21J81436 is a 65 W AC adapter designed to provide reliable power to ThinkCentre desktop systems and select ThinkBook models. Delivering 20 V at 3.25 A, it ensures consistent energy supply for both primary workstations and backup setups. Its slim-tip connector fits neatly with compatible Lenovo devices, making it a practical choice for office environments and home use.

Key features

• Power output of 65 W with a 20 V / 3.25 A rating supports stable and efficient device operation.
• Slim-tip charging connector designed specifically for ThinkCentre and ThinkBook systems ensures a secure and clean connection.
• Includes a 1.8 m DC output cable and a 1 m C5 power cord, offering flexibility in device placement and easy access to power outlets.
• Average power conversion efficiency above 89 percent reduces energy waste and helps maintain safe operating temperatures.
• Wide input voltage range from 100 V to 240 V allows use across different countries without needing a voltage converter.
• Compliance with over 25 global electrical safety standards guarantees dependable and safe operation in various professional and personal settings.
• One-year customer-replaceable warranty minimizes downtime by allowing quick and easy replacement.

Key specs

• Power output: 65 W
• Voltage: 20 V
• Current: 3.25 A
• DC output cable length: 1.8 m
• Power cord length: 1 m (C5 type)
• Input voltage range: 100 V to 240 V
• Power conversion efficiency: greater than 89%
• Connector type: slim-tip charging connector
• Warranty: one-year customer-replaceable

Connectivity and compatibility

This adapter is tailored for Lenovo ThinkCentre desktop systems and select ThinkBook models, ensuring compatibility with devices that use the slim-tip charging connector. Its design supports seamless integration into existing Lenovo setups, making it a convenient replacement or spare power source for these systems.

Performance and reliability

With a high power conversion efficiency, this adapter minimizes energy loss and heat generation, contributing to longer device lifespan and stable performance. Its adherence to numerous global safety standards provides peace of mind for use in corporate IT environments, classrooms, and home offices. The included cables offer practical lengths to accommodate various workspace arrangements.

Ideal uses and environments

The Lenovo 4X21J81436 fits well in office settings where ThinkCentre desktops are common, as well as in educational institutions and remote workspaces. It is a strong choice for IT teams managing fleets of Lenovo devices who need reliable, easy-to-replace power adapters. Its voltage flexibility also makes it suitable for users who travel between countries or offices with different electrical standards.

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Returns are accepted within 30 days of delivery. Items must be unused, in the same condition received, and include all tags, manuals, accessories, and original, unaltered packaging. To start a return, please email us for approval. Items sent back without approval may be refused or returned to the sender. If any item is kept, its value will be deducted from the refund.

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We act solely as a reseller. Any product warranty is provided and administered by the manufacturer, not by our store. That means eligibility, coverage, and outcomes are determined by the manufacturer’s policy for each brand and model. Before purchasing, we recommend reviewing the warranty terms on the manufacturer’s website or in the product documentation to confirm what is covered and for how long.

If you need warranty service, please file the claim directly with the manufacturer. They may require proof of purchase, the product serial number, original packaging, photos, or basic troubleshooting. Some brands ask you to register the product or obtain a case number before shipping it for repair or replacement. We don’t submit or approve claims, but we can point you to the correct support links and contact details.

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