This is what you probably want to watch first:
YouTube - DIY: How To Build A 1W Burning Blue Laser Torch!
I just ordered this kit from LPF member "Jayrob":
$55 - Stainless Steel 18650 kit
$12 - Copper heatsink upgrade (for module)
$25 - Copper 1/2" module (for laser diode)
$48 - V5 FlexDrive 'Hot' option maxed at 1500mA
$15 - Driver heatsink installed
$24 - EzFocus FLUSH Adapter (threaded deep for AixiZ 445 lens)
$10 - AixiZ 445 glass lens (for pointing)
$45 - Optional 405-G-1 lens (for burning)
$12 - Shipping + PayPal fees
It was $201 minus the battery, laser diode and 405-G-1 lens. This will be a BEAST of laser almost exactly like this one:
http://laserpointerforums.com/f52/1...-custom-hot-option-heatsink-driver-54222.html
You can purchase the 445nm laser diodes (from a Casio XJ-A140) for $52 from LPF member "daguin". The best 18650 battery to use is this one:
AW 18650 Protected 2600 mAh Rechargeable Lithium Battery
You can also do it the easy way and just order a non-focusable handheld from Dragon Lasers. I also have a Spartan 1.2 Watt 445nm blue laser on order (10-15 day wait before shipping) from here:
Spartan Series 1W Blue Handheld Laser, Rectangle Beam :: Blue Handheld Laser ----- 447nm Laser ----- Spartan Series Lasers :: Handheld Lasers :: Dragon Lasers
I have done quite A LOT of research into this recently and I have all of my notes. Please feel free to PM me!