For some campers, getting away from it all means a break for electronic gadgets like smartphones. For others there’s Kettlecharge, a device you simply fill with water, heat over your campfire or stove for 15 minutes, and use to provide a 10W charge.
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 – and you can do a lot with 10W
The manufacturers say 15 minutes heating should be enough to charge an average smartphone enough for five hours talk time or 20 hours listening to audio.