SmallSun ZY-C55 Cree Q3-WC 170-Lumen LED Flashlight (1*CR123A)

Pros: Side clicky! Don't hardly see that these days.
O-rings, both ends
Quite bright
Will take a CR123a or a protected 16340
Large hand-loop retainer attaches at the side of the base, allowing tail-stand

Cons: Threads aren't lubed

Other: This seems well-made, and if REALLY small and pretty darn bright is important to you, this light will serve you well.

Pros: Very light weight
Switch in right place for me
Good throw for small reflector
Good color
Lanyard doesn't interfere with tailstand

Cons: Thin walls
SKU8683 batteries jam in light

Other: Perfect little light for my use.

Pros: Came with extension tube not advertised. A great bonus. Now I can use AA batteries in it. Output is similar on AA Nimh to CR123 (but noticebly a fraction dimmer). Love the Clicky switch and the lightness.

Cons: Thin walls and rough threads. Need to stae that the "AAA" extension is included and you may get more sales. Gets a bit hot so power is wasted. This is normal tho.

Other: LOVE IT. For the money, it's well worth it. Runs on 1.2v to 4.2v. Another bonus. A blinding powerful narrow beam that lights up things a long way away. Add a bit of baby oil to the threads before asembling, if yours was as rough as mine.