The PowerPot and the BioLite stove seem like great ways to harness the heat from fire and turn it into electricity. But what if you already have a pot and a stove? A company called Point Source Power might have a solution for you.
There are a number of backup emergency power generators on the market that allow you to charge your iPhone or other smartphones without a traditional power source. Most of those involve consumables such as fuel cells or use solar panels that may or may not work depending on the environment.