Jeff is having trouble with his Dell XPS laptop because he can only get an hour and a half of battery life. Leo says that the XPS is considered a "desktop replacement," and an hour and a half really isn't that unusual. It's likely that if he looks for the "fudge words" in the ad, he'll see that his mileage may vary. That's why Leo advises never to buy a new piece of hardware without reading legitimate reviews. An ad is always going to stetch the details.