No power of any kind needed.  

You take a smaller pot and put it inside a larger pot. Fill the space in
between them with wet sand, and cover the top with a wet cloth. When the
water evaporates, it pulls the heat out with it, making the inside cold.
It's a natural, cheap, easy-to-make refrigerator.

Take Care & Stay Safe
David

"In the end, we will remember not the words of our enemies, but the silence
of our friends." - Dr. Martin Luther King Jr.