For Skip Schreiber, 64, an amateur philosopher with wispy white hair who lives in a van, power is the biggest challenge to staying wired. Mr. Schreiber tended heating and ventilation systems before work-related stress and depression sidelined him around 15 years ago, he says. For his 60th birthday, he dipped into his monthly disability check to buy a laptop, connected it to his car battery, and taught himself to use it. “I liked the concept of the Internet,” says Mr. Schreiber, “this unlimited source of opinion and thought.” Mr. Schreiber later switched to a Mac because it uses less juice. He keeps the fan and wireless antenna off when possible and cools the laptop by putting it on a damp washcloth. He says that by using such tricks, he can keep the laptop battery going for 16 hours, if he avoids videos.
