This sound weird but I wonder what innovations will look like 10years from now. Have you ever imagine that a time will come when you’ll be able to charge your phone with a burning flame and not electricity? I know Business oriented individual will be wondering how possible could that be?
Well, FlameStower Charger answers your question.

This portable, affordable charger efficiently captures excess heat from cooking or campfires to charge your USB-powered devices: cell phones, GPS, and more. It’s design allows for easy setup, charging, and storing, making FlameStower your affordable, go to device.

It's designed to work with any open flame: cooking stoves, camp fires, emergency candles, anything! Once the blade is in a fire, the thermal energy is transferred to the Thermoelectric Generator (TEG). The opposite surface of the TEG is in contact with the water reservoir? Hot side gets hot, cold side stays relatively cool, and the temperature difference generates electricity.
This is What it Can do
>>Charges any small electronic device-phone, camera, flashlight in any environment with fire
>>Charge anything with a USB cord
>>Any fire source will work, including a camp stove, campfire or grill
>>Light, compact and rugged
>>2.5 Average watts of power-enough to charge your phone in about 2.5 Hours; 1 minute of charge time gives 2 minutes of talk time

This might be a saving grace when all you have is a flame and your power bank is completely out of juice. This is simply Physics.
It goes for $99 on Amazon
See how it works below


https://www.youtube.com/watch?v=Gce27LNULcQ

Personally, i'm working on how to generate electricity from wind
i kinda loose hope from NEPA

This will be useful when in the wilderness