About ten years ago, I lived in an area where power outages were a common occurrence, sometimes lasting up to a week. Naturally, during those times, I found it necessary to own some sort of flashlight or headlamp, along with whatever batteries it took. Unfortunately, being that this was in rural America, all of the available headlamps (coleman/energizer/craft, at walmart, at lowes, at DG, etc) are of such low-quality that they basically start out being trash. As a rule, they take three AAA's, and also, as a rule, they flicker out all the time so you have to give a technical-tap every few minutes to jiggle the loose connections, and that's when they're actually working. Over the course of two years, I went through five headlamps. I had one explode on my forehead after only five minutes of use.

It made me very sad, that we as a species appeared to have forgotten how to build a simple apparatus consisting of a light-bulb, a switch, batteries and wires. So then I got a Fenix. It's machined out of a single block of aluminum and it takes 18650 cells instead of triple A's. I've used it on a regular basis for the last decade and it still works every time I need it, the whole time I need it. No more technical taps.