Discover how to transform everyday objects into useful energy devices in this exciting DIY science project. Learn ...

Whether you're off-grid or in a blackout, this compact gadget lets you charge your phone and power a light — no outlet needed ...

So... the people have spoken. You’re either happy or furious today. Either way, you’re going to need more energy for your phone soon (#firstworldproblems). This ...

I've seen lots of hand crank chargers for cellphones, either built into radios or as standalone units, but between the fine print and the customer complaints, there doesn't seem to be one that really ...