The Stower Company invented an emergency charging device that doesn´t be plugged in and it can charge any device using a lit candle and water. The Stower Candle Charger. How does it work? A long-burning candle heats the bottom of a water and the difference in temperature produces an electric charge. The Candle Charger provides the user with a 2.5W output to a smartphone, a camera, smartwatches or USB torch among others, through a USB charge.
All images via Kickstarter