COMPATIBLE with the following 65 and 90 wattage laptops: ThinkPad L540, ThinkPad X250, X260, and ThinkPad W550s, ThinkPad T550, T540p (dual core models), T460p, T440p (dual core models), as well as the Integrated graphics (not discrete graphics) models: T440, T440s, T450, T450s, L440 and L450