The Lenovo ThinkPad 135W AC Adapter (4X20E50566) is a replacement or spare power adapter designed for compatible ThinkPad laptops with Lenovo's rectangular Slim Tip power connector. It delivers 135 W of rated power, making it a practical charging accessory for users who need an additional adapter at home, in the office or while travelling. The adapter supports 100–240 V AC input at 50–60 Hz and is designed to meet the same specifications as the standard adapter supplied with compatible ThinkPad systems. Its compa design and included AC power cord provide a convenient way to power a supported laptop and recharge its battery. Key Features 135 W Rated Power: Designed to supply power and charge compatible Lenovo ThinkPad laptops. Rectangular Slim Tip Connector: Uses Lenovo's rectangular power connector for supported ThinkPad systems. Wide AC Input: Accepts 100–240 V AC at 50–60 Hz for use with suitable power connections. Replacement or Spare Adapter: Meets the same specifications as the standard adapter supplied with compatible ThinkPad laptops. Compa Design: Practical for keeping an additional charger at home, at work or in a carrying case. Energy-Efficient Design: Lenovo specifies Energy Star V (ES 2.0) and a one-year warranty. Technical Specifications Component Specification Lenovo Produ Name ThinkPad 135W AC Adapter (Slim tip) Part Number 4X20E50566 Produ Type Laptop AC Power Adapter Rated Power 135 W Charging Connector Rectangular Slim Tip AC Input 100–240 V AC, 2.5 A, 50–60 Hz Adapter Width 65 mm Weight 0.50 kg Energy Efficiency Energy Star V (ES 2.0) Warranty 1 Year Compatibility & Important Information Compatible Connector: Designed for ThinkPad laptops using Lenovo's rectangular Slim Tip power connector. Round Connector: Not compatible with ThinkPad laptops that use the older round, barrel-type power plug. USB-C Charging: This is a Slim Tip adapter, not a USB-C charger. Power Requirements: Check that the laptop supports a 135 W Slim Tip power adapter before purchasing. AC Input: Supports 100–240 V AC at 50–60 Hz. The supplied AC power cord must be suitable for the local wall outlet. Package Contents Lenovo ThinkPad 135W AC Adapter AC Power Cord User Guide Please to review Q: What is the power rating of the Lenovo ThinkPad 4X20E50566 adapter? A: It is a 135 W AC power adapter designed for compatible Lenovo ThinkPad laptops. Q: What charging connector does this adapter use? A: It uses Lenovo's rectangular Slim Tip power connector. Q: Is it compatible with ThinkPad laptops using a round power connector? A: No. Lenovo explicitly states that this adapter is not compatible with ThinkPad laptops using the round, barrel-type power connector. Q: Can this adapter charge a USB-C laptop? A: This model uses a rectangular Slim Tip connector rather than USB-C. It is intended for compatible ThinkPad systems with the matching power input. Q: What input voltage does it support? A: The adapter supports 100–240 V AC, 2.5 A, at 50–60 Hz. Q: Can it be used as a replacement or additional charger? A: Yes. Lenovo describes it as a replacement or spare adapter that meets the specifications of the standard adapter supplied with compatible ThinkPad laptops. Q: What comes in the package? A: Lenovo lists the ThinkPad 135W AC Adapter, an AC power cord and a user guide. Q: What warranty does Lenovo provide? A: Lenovo specifies a 1-year warranty for this adapter.
