Superfluously incorporating ‘bio’ into product names is by far the cheapest way to give off the impression of ‘going green’. But, for the BioLite CampStove, it actually makes sense: you recharge your gadgets by burning kindling. All that’s required is tossing some branches into the stove, incinerating them, and witnessing several laws of thermodynamics unfold as heat transfers energy to the USB outlet. The Biolite CampStove ($129) is available for pre-order now, and will hit online stores come camping season. Which is perfect because, once the inevitable apocalypse is upon us, owning a renewable source of electricity will basically make you king of the wasteland.