Calculating laptop weight
When computer companies specify the weight of their laptops, I’m certain that they do it under ideal conditions, possibly at the North Pole or some other location where the earth’s gravity field is at its weakest. The weight advertised is, like they say, “for comparison purposes only.” Commonly left out of the laptop’s weight is what’s known as the power brick. This is the AC adapter used to connect the laptop to a wall socket. When the laptop isn’t running off of batteries, you need the power brick to supply the thing with juice. This means that the power brick is a required accessory — something you have to tote with you if you plan on taking the laptop on an extended trip.
In the old days, what they didn’t tell you in the advertisements was that the power brick often weighed half as much as the laptop itself! Either that, or the power brick was more bulky than the laptop, as seen nearby with the Dell 320LT’s obnoxiously big power brick (and heavy 30-minute batteries). Lugging around such items is not very convenient. Things are better today.