I got one of these a few weeks ago and I love it. Some of the weird things it does i.e. not turning on sometimes after a click of the switch seem to disappear when you use a protected sized 18650 as they are a bit bigger and fill the gap between the spring and back button contact a little more snugly. I'm using a Ultrafire 3000mah protected cell and it was a bit of a fight to get in in the case but it fits nicely and lasts a long time!
I too notice that this red burns very quickly in comparison even to my 8x MXDL blu-ray build with glass lens!? Which needless to say pisses me off a bit but hey, it was a great deal then right? $54 for a high powered red burner with focus and water proofing.
Also this unit is not nearly as big as it seems in the pix above in comparison to the mini blu-ray unit.
When you bought the Ultrafire 300mAh protected batteries were you able to charge them in the charger that came with the laser or did you have to buy another charger? If you had to buy another charger which one did you buy?