Lot Great Power

Lot Great Power
I want to feed a fan while camping, my best option seems to be the cycle of deep cycle batteries. What should I do?

I have traveled the Internet for hours and learned a lot research on the subject and solar batteries. Solar seems too expensive for what I do. I just want to run a fan box for 72 hours or less. I'm not good with electrical things so you do not know how much energy it will take or how many batteries, can anyone help?

fans of the style muffins do not get a lot of power and a product much air. Just make sure that they are 12v and 5v.

Lugia’s song ~ PIANO (The Great Guardian / The power of one) [Sheet music ]