I have two pink minimags cut down to single lithium size. One runs off a single cr2 the other off a single AA size 3.7v cell. Both run a tlex5 led dropin that's somewhere around 140ish lumens at that voltage. I've just built a run of five pink single AA size with a much better dropin, having a little more work done. Built them for the Komen breast cancer fundraiser this year. See below pic of the cr2 one, I'll try to take pics of the others.
Pink minimag: $12
tlex5 dropin: $24
cut/thread: $depends on who you know
3.7v cell: $2-15
Happy old lady with a tiny pink flashlight thats "aww so cute" but will knock you down if you look at it in the dark: $priceless :devil:
Sorry, only pic I could find of the cr2 size. Tiny blue and pink ones on the right end.