By Nate Adcock on Tue, 08/18/2015
The FlameStower Fire Charger ($99) made me a little nervous when I first pulled it from the box and set it up. It's the brainchild of two Stanford students, Adam Kell and Andrew Byrnes. The contraption looks like something featured on MythBusters, but this weird-looking stand can actually kick out a 2.5W charge to your iPhone with nothing more than the primitive elements of fire and water (it also purifies the water in the process). Great for emergency or camping kits. How does the Fire Charger (or the in-home Candle Charger version) do it?