If you are talking trying to pot mod a green laser, which i assume this is what you are talking about let me refer you to this.
Quote Chipdouglas
"
Q. What is a pot?
A. A pot (potentiometer) is an adjustable electronic component used to adjust the output current of your driver (sloppy answer, but to the point)
Q. Does my laser have a pot?
A. How am I supposed to know? But seriously google images "potentiometer" and see if your driver has something similar.
or go here
http://www.lmgtfy.com/?q=smd+potentiometer+images
Q. Will adjusting my pot affect the life of my laser?
A. Yes it will. If you get any life after at all.
Q. Why is there so much hostility towards me/my question.
A. Because you didn't bother using the search button!!!!
Q. Will I ever be able to get my <5mw to burn matches by pot modding it?
A. NO!!!!!
Q. Will pot modding make my Green DPSS laser more dangerous.
A. Yes it will. By increasing the Green Power, you also increase the IR power.
Q. I made a new post titled "help me pot mod my laser" but i did'nt get any hits or positve feed back?
A. Once again it goes back to you not using the search button first!!!! "
the above was taken from this thread, more info on pot modding can be found at this link
http://laserpointerforums.com/laser_pointer_forums_3/forum/showthread.php?t=40510
Basically what all of this is saying is that pot modding is not worth it!