I currently have 14500 rechargeable. Then of course any alkaline. From what i've been noticing, it appears that the 18650 seems to be a well used battery. I am good for using any battery that comes in a rechargeable version. I just can't see purchasing a $100 light and then forking out $100 a year just to keep the photons flowing
I currently just have some cheaper chinese knock offs. (Ultrafire c3 1xaa/14500 and the Uniquefire S10 Cree R2-WC)
I just decided to purchase them after seeing some reviews against the mag led's and i was just "wow'd". Until that point i had really only ever used standard Krypton bulb flashlights. Mag 3c, and the like.
As my new found interest grew, i began searching through these forums and saw some of the real WOW flashlights. Some of the stuff you guys do here in the mods and custom builds is just AMAZING!