In reply to neuromancer:
I have a Casio PRW-3000
All black, solar battery (I never need to worry about the battery), cheap, and in terms of altitude, it's usually good for a couple of hours or so (although I could imagine if it was a fast-approaching blizzard it might get out of accuracy very quickly, but then what are you doing there with a fast-approaching blizzard!?)
Post edited at 13:25