A Candle-Powered Speaker Keeps Playing Even When the Power's Out

Using a scientific phenomenon known as the Peltier-Seebeck or thermoelectric effect, where a voltage is produced via a device with contrasting temperatures, this Bluetooth speaker called the Pelty can run on nothing but burning candles. So the next time you lose power during a brownout, you'll have both light and… » 6/24/14 6:00pm 6/24/14 6:00pm