Re: 18650 recommendation: Nitecore, Orbtronics, what else?
I generally run naked cells, in my single cell lights, but Keeppower, EagleTac, International-Outdoors, Effest, most light manufacturers, among others, all use good quality cells.
The key is in knowing what cells are actually being used, since the generic stuff can sometimes have the same listed capacities as the Big 5, so it can get confusing.
Chris