Goondu review: Dynabook Portégé X30L-J impresses with lightweight design PC The Portege X30L-J weighs just over 900 grams. PHOTO: Alfred Siew We get a fair number of laptops to review at Techgoondu, so when I recently picked up the FedEx box that the Dynabook Portege X30L-J came in, I was surprised how light it felt. Can a laptop feel so light? Well, apparently so, with a machine that weighs under 1kg. Just 906 grams, to be precise. It’s not surprising that Dynabook has made the Portege X30L-J’s thin and light chassis a main selling point. This is the lightest in its class, as the manufacturer is keen to say.