AC adapter Lenovo 45W 3‑pole model 5A11E21014 for laptops and compatible devices

Lenovo AC adapter 45W 3‑pole model 5A11E21014 is a compact external power supply designed to deliver stable 45-watt power to Lenovo laptops and compatible devices. The adapter combines a small footprint with a three-pin DC connector to provide reliable charging and steady voltage regulation for everyday mobile computing needs. Its lightweight construction and integrated cable management make it suitable for use at home, in the office, or while travelling.

Advantages

This 45W Lenovo AC adapter provides consistent output power for charging and operating laptops under normal workloads. The compact design reduces bulk in bags and on desks, and the 3‑pole connector ensures a secure electrical connection. Built-in protections guard against common electrical faults to maintain device safety and prolong battery life when used as intended.

Suitable for

• Charging Lenovo laptops and notebooks that accept a 3‑pole DC connector and 45W input
• Replacing a lost or faulty compact power adapter
• Carrying as a travel spare for business trips or commuting
• Powering compatible docking stations or USB hubs that draw up to the adapter's rated power

Key specifications

• Output power: 45 W
• Connector type: 3‑pole DC connector
• Intended use: external AC power adapter for laptops and compatible devices
• Form factor: compact external brick with attached cable
• Protection features: over-voltage, over-current and short-circuit protection (built-in)

How to use

Connect the adapter to a mains outlet using the supplied power cord, then insert the 3‑pole connector into the laptop's power jack until it seats securely. Verify that the laptop indicates charging or operating from AC power. When not in use, unplug the adapter from the mains and disconnect it from the laptop. Allow the adapter to cool in a ventilated area if it becomes warm during extended use.

Recommendations

Use the adapter with devices that match the required input specifications and connector type. Avoid exposing the adapter to moisture, extreme temperatures, or prolonged periods of heavy dust. If the adapter shows signs of damage, frayed cables, or inconsistent charging, discontinue use and replace it with a compatible unit.