The TK-703 looks nice and I may buy one myself, but for longevity I'd have to suggest the Fenix E01 with many sources, and non-affiliated but personal favorite is: http://www.batteryjunction.com/fenix-e01.html $12.50 plus shipping, but look around you may find a better deal. Not very bright, but brighter than the mini-mag I'm sure, and I've given away more than 20 as gifts and I've seen or heard of none of them dying.