As I write this column, I am sitting on a lovely, comfortable stool, with a big table for my laptop, notebook, water bottle, coffee cup, and phone.

The versatile and low-power Raspberry Pi seems like the perfect candidate for portable computing, so what are your laptop ...

It will handle a maximum of 140 watts, depending on how many cables are plugged in and the draw of each device. It’s small, about 2 by 3 inches, and yet can charge a phone, laptop, tablet and ...