Portability Without the Pain. Carrying a 2.5kg brick in your bag is a quick way to ruin your day. But here’s the catch: many a Lightweight Laptop is so thin it bends like a wet noodle or overheats in seconds. I’m hunting for the machines that weigh next to nothing but still feel like proper computers. I’ve checked the chassis rigidity and the port selection so you don’t end up carrying a bag full of dongles just to plug in a mouse.