Lenovo 20V4.5A Big Pin

Lenovo 20V4.5A Big Pin A Lenovo 20 V Big Pin adapter is a replacement AC power adapter designed for Lenovo laptops that require 20 V DC power through a round barrel connector with a larger “big pin” (center pin). This style of charger is often used on older Lenovo ThinkPad, IdeaPad, Edge, and other series that don’t use USB-C charging ports.