Check out the Biolite Kettle Charger! https://amzn.to/2J4HqC9 The Thermoelectric Generator [TEG], located on the base of the KettleCharge, uses a difference in temperature to produce electricity. This comes from having a hot side and a cold side within the device. The Kettle filled with water serves as the cold side; the flame of your stove in contact with the baseplate is the hot side. As you bring the water to a boil, electricity is produced and sent to the Power Handle, leaving you with potable water and 10W of usable power. For more tips, tricks, recipes, gear reviews and more - visit us at: http://www.50Campfires.com Don\'t forget to check out the 50 Campfires : Daily Outdoor Podcast: http://bit.ly/daily-outdoor We\'d love to have you join us over on Facebook as well: http://www.facebook.com/50Campfires Our monthly digital magazine is free! Claim your subscription here: http://bit.ly/50CFMag