One of my earliest posts at this forum, you can read down the page
http://laserpointerforums.com/f45/200mw-transformable-focusable-green-laser-43868-2.html#post617220
This laser burns VERY WELL!
If you want I can make a burning vid and burn several items with it next Tuesday when I have a bit time again. Who told you that you need IR to burn? IR is a bad wavelength to burn. The lower the WL, the more power (405nm are burning beasts!). According the battery, it has a very good runtime, like 1h use for one battery load. I didn´t test and timed it, just a guess. But since I have it (and I use it a lot) I loaded the 18650 not more than 3 times. Hope that helped.