USB Fan ,zero Cost

Hi guyz i found an awesome way to make an usb fan from junk
to be frank i haven't spent money on it  so try it out
its portable too im using this on laptop its very useful to me. by adding an battery on it you can carry with you


Parts needed :-shown on below images

this fan is given me unexpected performance ,woh wind is cool and getting over half meter.



Note :-careful while connecting supply ,you should  connect the +ve of motor to +ve of usb cable
            and -ve as same.else it will rotate reverse direction so you wont get wind.