I should shut up about heating/lighting because I really want to get to comms (I know...Water, Food/cooking, Sanitation come first).
Now that Surefire has raised their price to $2 for a CR123A I thought I'd post what I've been using lately:
TitaniumCR123A-100.jpg
They are only $1 apiece at
Amondo Tech and have gotten a very
good review at flashlightreviews.com. They actually got better run times in an L4 than Surefires.
I have no association other that as a satisfied customer: two orders filled promptly.
mugwump