On a more general level, I would like a flashlight that did more with battery monitoring. In the old days you could tell exactly what was happening with a battery just by switching a light on. The practice of regulating lights has destroyed that feedback and I want a useful substitute. I imagine a string of tiny LEDs,
maybe a mm each in diameter, laid out somewhere on the light, maybe around the head, that would light up depending on how much charge was left.
Lots of ideas are possible here. Anyway, once the flashlight always knows how many electrons are left in its tanks it could shift the brightness knob
over to a runtime dial. I would find this a lot more useful. Am I being clear here? I have in mind a ring or something that would control brightness through
runtime. If I set the light at "One Hour," the light would throw a beam bright enough to exhaust its batteries in that period of time. I could if I liked dial it to an hour, or ten hours, or a hundred hours, or whatever. I will buy something like that whenever it hits the market.