Note: Not a real fire, I just added that for effect.
This is the FlameStower USB charger (links to Kickstarter campaign if you want to order one). It charges any USB enabled device with the power of fire. You just unfold the unit, fill the cup on top with water (no word if spit or urine will work if you're really desperate), plug in your device, and add a fire source to the far end of the metal stick. In 30-seconds, BOOM -- you're charging. Or melting your phone because it's too close to the campfire. That was your bad, now quit dicking around and get back to making those s'mores you promised me.
Hit the jump for an explanatory video.
Thanks to lebeeps, who agrees if you find yourself charging your cellphone by fire so you can take naked sexting pictures of yourself in the forest you are doing it f***ing RIGHT.