In reply to Rick Benifer:
last year i was in a place that was really cold, so me and a few others had brought along the myo belt version.
all 3 fizzled out within 2 weeks, amidst sniggers from others there whod already been thru the experience.
to be fair, one was got going again with some fiddling with the battery cord connection. but still.
it doesnt seem to be other petzl headtorches. i also have a zipka thats been really good.
maybe too we had a bad run, and the belt is more prone to problems anyway with the dangly cord.