I'm in a quandary at the moment. I like the size of the 14500, and I run a 1.2Ω RM2 on one of them, which I like, but I suppose I would be better off going to a 2.1 for the batt size. I have one of the original mini 18490's which I also like, but because of the size, just not quite as much. So I guess it's decision time as to which I am going to be looking for. I do look occasionally at the blems in hopes of finding something there. So maybe a 2.1 if I can get one.