I'm considering buying a steripen adventurer but am hoping to hear from some users on high altitude performance first. Normally, I only carry micropur tabs, but would really like to reduce the amount of water I need to carry when on hiking trips ranging 10-14k feet.
I understand it will work best if I take out the batteries between uses and make sure they are warmed up before purifying. I plan on using surefire batteries as I already have some.
There's a bpl user review where the steripen performed poorly at high altitude, even on new lithium's that were warm. It worked well again once at lower heights.
Any other experiences with this?

