You can now charge your iOS device or smartphone from the campfire with Biolite CampStove. You can forget the fuel from now on. Charge your gadgets only by burning sticks, pine cones, pellets and other biomass. See more for video.
The device converts the fire's heat into electricity for a USB charge. It needs 4.5-minutes to boil 1 liter of water and features a fire power output between 3.4 kw and 5.5 kw, powers pretty much all USB-chargeable devices, and most effectively burns “sticks, pine cones, pellets and other biomass.”