The Lenovo Laptop Charger with a 20V output, 2.25A current, and a 4.0 x 1.7mm connector is a compact and efficient power adapter designed for Lenovo laptops. With its specific connector size, this charger serves as an ideal replacement or spare for Lenovo laptops requiring a 20V power supply. Providing 45 watts of power, it ensures reliable charging to keep your laptop ready for use. Whether you need a backup charger for travel or a replacement for your original, the Lenovo Laptop Charger with a 4.0 x 1.7mm connector offers a convenient and dependable solution for meeting the power requirements of your Lenovo laptop.