This one
http://laserpointerforums.com/attachments/f52/37738d1335663812-skylasers-pl532-700mw-532nm-670.jpg
I used it in this review, uses a 9v battery, wires are cloth loomed
http://laserpointerforums.com/f52/skylasers-pl532-700mw-532nm-73916.html
$80