Laptop charger AVACOM ADAC-LE4-A90W 20V 4.5A 90W for IBM/Lenovo with square connector

AVACOM ADAC-LE4-A90W is a 90W AC adapter designed for IBM and Lenovo laptops that use the square-style power connector. It delivers a 20V, 4.5A output to support battery charging and device operation, and is intended as a replacement or spare unit. The adapter includes basic protections against overcurrent and short circuit and comes in a compact, portable form factor suitable for everyday use at home, in the office or while traveling.

Advantages

The adapter provides a stable 20V/4.5A output that matches the power requirements of compatible IBM/Lenovo notebooks with a square connector, ensuring consistent charging and reliable operation under typical loads. Its 90W power rating supports charging during light to moderate CPU and GPU usage. Built-in protections reduce the risk of damage from short circuits and excessive current. The compact design and standard AC input make it easy to carry and use across different locations.

Suitable for

• Replacement power adapter for IBM and Lenovo laptops with a square power connector
• Use as a spare adapter for travel or remote work
• Powering and charging laptops during presentations, meetings, or at a desk
• Temporary replacement when the original adapter is lost or damaged

Key specifications

• Output voltage: 20 V
• Output current: 4.5 A
• Power: 90 W
• Connector type: square laptop power connector (compatible with specified IBM/Lenovo models)
• Protection features: overcurrent protection, short-circuit protection
• Form factor: compact external AC adapter
• Use environment: indoor use; suitable for home, office and travel

How to use

Connect the adapter to a suitable AC mains outlet using the supplied or compatible power cord. Plug the square connector into the laptop’s DC input jack until it seats firmly. Verify that the laptop indicates charging or accepts external power; charging LEDs or the operating system power indicator typically confirm connection. Do not force the plug if it does not fit; confirm connector orientation and model compatibility before use. Unplug the adapter from the mains when not in use for extended periods.

Usage recommendations

Use the adapter only with laptops that require 20V and accept a square connector. Avoid exposing the adapter to liquids, extreme temperatures, or sustained heavy-load operation beyond the adapter’s rated power. For prolonged high-performance computing sessions, ensure adequate ventilation and consider using an adapter with higher wattage if required by the laptop manufacturer.