The Hatsuden-Nabe cookpot charger turns heat into electricity fit for charging phones, MP3 players or tablets. It's built to be put out on a campfire and uses a special ceramic material that uses temperature differentials to generate electricity.

The device sells in Japan for around $300 and is being marketed to people affected by the March earthquake and tsunami. The company is planning to expand to developing world countries with spotty energy grids.

I am excited about their potential to do a lot of good around the world, but I would also love to have one of these for camping. Solar is hard to deploy when you're on the move and isn't super effective at small sizes. The perfect charger would work during down time — night time.

Are you on TwitterFollow me (@sheagunther) there, I give good tweets.

And if you really like my writing, you can join my Facebook page.

The opinions expressed by MNN Bloggers and those providing comments are theirs alone, and do not reflect the opinions of MNN.com. While we have reviewed their content to make sure it complies with our Terms and Conditions, MNN is not responsible for the accuracy of any of their information.