Laptops are common now; most people have them to take to school or when they travel for work. They're useful and easy to move with. What is also common is to see someone scrambling to find a place to charge a laptop battery. That report due tomorrow may suddenly be lost if you don't find an outlet within thirty seconds... Or that slideshow you have created (but carelessly forgot to save) may disappear if your laptop battery is not recharged.

As common as laptops are now, it is just as common to see individuals forgetting that the machine needs a little bit of help to run. It does not magically power itself; the battery does not somehow manage to stay full as you work for hours at a time. Yet, many seem to think that their battery does just that. No matter how long they stay hunched over the machine, it will work.