ok, pointer here, and as i said, its kinda possible, with some changes.
If u cut the thread part off the laser head (not the battery holder, the thing that screws(the external thread) on the battery holder), and inside the laser head, next to the minus spring, if one another machines a new inside thread for the AAA holder (hat has an external thread) it is possible to switch to a AAA battery holder instead of those nasty N size batts.
u just need a pen from the ebay guy that sells those overspec BR pens (either green or blue, and the battery holder for those pens goes really nicely, and really tight(id say they are really perfect) into the head of the pointer. But as it doenst have a thread to be screwed to it wont go any further, so i suggest a machined thread path.
but do it at ur own risk. althought one another shouldnt have a great problem...id say a key maker to be able to do that...dunno.
(edit)ok, i think that was a bit confusing:
1-Cut off the external thread of the laser head
2-measure the external thread of the AAA holder(so u can machine the thread to fit)
3-Machine a new internal thread in the laser head
4-VOILA! a dual (or triple if u got the mirrors in place) laser pointer that uses 2xAAA bats
ebay lasers:
Green laser pen-cheaper(6.05$ with shipping- US and Europe i guess)
Green pen- free shipping(7.30$ better price for bulk)
BR pen- 10.37$ with shipping- US and Europe i guess
Br pen- free shipping. Again better for bulk
i still dunno if im goin to try that...only if im sure to be able to do that without damaging the laser.
But ill cover this with pics and stuff when i start mounting the mirrors(edit)