The Power Pot Portable Electric Generator The PowerPot Converts Heat into Electricity! Charge any USB device over any heat source including an Open Flame! Charge any handheld device with USB including smartphones, digital cameras, lights, head lamps, radios, water purifiers and GPS. Waterproof, fire-resistant, extremely portable and works Day or Night, Rain or Shine! 20 Minutes of Charging Gives You 90 Minutes of Talk Time!