I see somewhere someone is selling these green laser pointers for $150, i made this one for less that $50.
First i got a Laser host off ebay as in the first photo.
For the law of the land i got a 5mw green laser module, personally i use a 30mw but 5mw is all that is allowed, you must get one with no wires and a spring like in the 4th photo, (don’t even think about any other colour, green is the best) i then bypassed the switch as you can see in the 5th photo,
You will need a 18650 battery and charger.
http://i42.tinypic.com/8z4ujb.jpg
Push button on off switch.
http://i42.tinypic.com/2z5kdjb.jpg
Unassembled
http://i44.tinypic.com/w82on7.jpg
Green laser module you will need, the alloy sleeve is part of the laser host, the module doesn’t come with this.
http://i41.tinypic.com/9gexqt.jpg
You can see the small piece of wire that i have soldered between the switch terminals, this bypasses the switch and now the push button on the end of the housing becomes the on/off switch.
http://i42.tinypic.com/hwbhg6.jpg
Put it all together and Bob’s ya uncle.