At under 1kg, Dynabook Portégé X30W-J is a powerful convertible laptop that defies gravity PC Dynabook’s new Portégé X30W-J is a premium lightweight convertible laptop. PHOTO: Dynabook handout When it comes to buying a laptop, there’s almost always the trade-off between portability and performance. Well, not with the Dynabook Portégé X30W-J, a premium convertible laptop that is light and easy to carry around yet a heavyweight in performance. Tipping the scales at just 989g*, it is the world’s lightest^ 13-inch convertible laptop that features Intel’s latest 11th generation Core processor and Iris Xe graphics that promise improved performance on the go.