Instructables
This is a mini pocket-portable fan connected to the phone, and it`s very good for long trips because its working very long ( about a six hours! ).
 
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Step 1: First...

At first you will need at least 3.7v  battery with phone,switch and tipical 5v computer fan. Then you need to cut other fan wires but leave red and black wires. Now just solder it all like shown in pictures.

Step 2: Second...

Tape, tape ,tape....................................................................................................................................................................................................................

Step 3: Third...

Picture of Third...
The just search internet for flash battery monitor (SFW)...





Good luck!
matass (author) 2 years ago
I`m testet it and:
Mine working about 12hours!
Giedow2 years ago
Looks a lot like mine.....just saying