As Y2K approached and the world waited for blackouts that never came, human-powered electric gadgets saw a surge of popularity. These radios, flashlights and other devices don't need batteries -- they ...

When the power goes out or the trail gets dark, a reliable flashlight can make all the difference. But why rely on batteries when you’ve got the sun? A solar-powered flashlight is a smart, sustainable ...

Which solar-powered flashlight is best? When the power goes out or your car breaks down, the last thing you want is a flashlight with dead batteries. A solar-powered flashlight gets energy from the ...