uses CR123 batteries. Will be driven little hotter compared to the single AA headlamps. As discussed, the 502 models are more flood or 52w models are combo flood/spot. 52w is a popular model.
So got the itch to fill the flashaholic side of me. Ordered a new Klarus Xt11 (have the older xt11) and another Zebralight h52w. I have the Fenix HL30 that is a few years old. Will retire that to either truck or camp duty light. I am sticking to all AA for back country. GPS uses 3 AAA, ZL h52w 1 AA, Klaurs Xt2A 2AA.