I still say that for The Muggle™, there’s nothing better’n something like a ’501 or ’502 with a 1-mode sane drop-in. Or at worst, a 2-mode that always comes on in a reasonable low (eg, 200lm) and can be kicked up with a half-press to 500lm or so.
Not traumatic enough to overheat, “low” is still plenty of light vs an old-timey Mag, so even if they forget how to kick it up to high, it won’t run down the cell for a long time.
Throw in a cell with built-in usb charger, and it should be manageable for anyone who can a) charge a cellphone by plugging it in, and b) swap batteries in a typical craplight.
Give it a once/10sec blink for when it dips below, say, 3.5V, and once/5sec if it gets critical at 3.2V or so (it’ll drop like a rock soon after). Wait ’til 2.whatever, and it’d be dead in seconds, leaving The Muggle™ little if any time to react, ie, running to charge it before… whups.
