This adapter is designed for Lenovo laptops that require 20V and 2A input through a 5.5 × 2.5 mm connector. It delivers a stable 40W output, making it suitable for charging the battery and powering the laptop during normal use. The adapter includes built-in protection against overheating, overvoltage, overcurrent, and short circuits to help ensure safe and reliable operation. Its compact and durable design makes it ideal for use at home, in the office, at school, or while traveling.