Anyone without reliable access to electricity, or who want to stay connected if it's lost. Hikers and other outdoorsmen. Survivalists. People who live in areas

Anyone without reliable access to electricity, or who want to stay connected if it's lost. Hikers and other outdoorsmen. Survivalists. People who live in areas prone to natural disasters that can knock out electricity. People living in countries with poor infrastructure. When I was in college, a hurricane knocked out electricity on my block for about a week. By careful rationing of my UPS battery I was able to briefly use the internet a few times a day, just enough to check my e-mail and get updates on the situation. I think keeping a few low-power "backup" devices (and a portable solar panel or hand crank) seems like a decent investment.