It would be easier to buy a Sandwich from The Sandwich Shoppe. These are both good. The BB500 will have constant brightness for about 1.5 hours on 2AA alkaline batteries. The MM will gradually dim, but it will drain your batteries down further. I prefer the BB500 but there isn't a lot of difference IMHO and you won't go wrong with either one. You might want to check the Run Time Plots in the Reviews Forum.
