i backpack and hike quite a bit and always carry a small nalgene cylinder like container about 4"x2" with a variety of batteries, next to one another, vertically. my only concern has been condensation from changing temperatures forming inside and possibly shorting out the batteries. it hasn't happened before but this isn't something i want happening if i'm out in the wild for a few days. my question is, should i buy some silica gel packs or something to put in there to absord possible moisture? do they even work that well? is there a better, fool proof, way to store some AA and CR123 batteries while i'm backpacking?
I bought some of these after another person on CPF recommended them. They are excellent and I don't just throw that term around. They can hold up to 7 123 cells (they work better with 6). I've never tried AA cells so I can't say how many it would hold.