Modding a USB port

Any experts know how to mod a USB port to an external powered source ?

batteries or something .

cause my laptop cooling pad is not powerful enough using the power supplied from my usb port .

thanks .

i think that there are adaptors available.

i think that there are adaptors available.

i dont know ..

where to get them ?

any pic ?

i think its not difficult to modify 1 yrself,

i think its not difficult to modify 1 yrself,

i dont know how .

so i need someone to teach me .