4X20Q88539 Lenovo 135W Slim AC Adapter for ThinkPad Extreme 20MG is light in weight and compact in size to fit the 135W power adapter specifically designed for Lenovo ThinkPad Extreme 20MG laptop. It has a power output of 135 watts with which the adapter is able to quickly charge the device. It is easy to carry and store due to its slim design. It is perfect for frequent fliers or business professionals. Also, the adapter comes with enhanced safety measures to avert device damage due to overcharging and overheating. In general, the 4X20Q88539 Lenovo 135W Slim AC Adapter is a dependable and portable power adapter for users of ThinkPad Extreme 20MG.