Solar-powered battery packs are great to toss into a backpack for a hike, or use in an emergency, right? Here's what to know ...

A solar-powered battery charger features patent-pending technology that provides an energy system to distribute electrical impulses generated by a solar panel. It uses a microprocessor to implement ...

The sun is finally making a comeback, which means festivals, garden parties and – most thrillingly of all – the prospect of harvesting free electricity from the sky using one of the best portable ...