I have been using a prince pocket torch for more than a year. You may consider it a little bit bulky. But if you need a lighter which does not leak (it has a cap on it and it won't burn unless you remove it, connected with a chain to the lighter), which has a flame lock (a red button, when pushed it gives contunious gas flow) and a plastic stand to put it on when you are doing repairs.<br><br>The flame is jet powered and you may cut through soft metal and hard plastics. The flame jet works without consuming too much gas. You can fill it with ordinary lighter gas. I smoke about 30 cigarettes a day, do few repairs with it sometimes, light BBQs etc. and it lasts about 40 days without refilling. <br><br>you may find a review on http://www.reviewguys.com/202/004.html<br>order one from<br>http://www.hill.u-net.com/flame4.htm in europe<br><br>or just check out from tobacco shops.<br><br>I have used it in extremes (not in high altitude myself but someone else did) without any problem. It easily lights wet wood and you can point it to anywhere without burning anything else. You can use it with the lock on the stand to heat up a paper clip (takes about 5 seconds) leaving both hands free. Excellent for repairs, good flame control.<br><br>If you have the chance try it in a tobacco shop or etc. it is one of the best pieces on my kit.<br><br><br><br>Survive and Protect