Cold temperatures can kill your batteries in an hour, rendering them useless. You have two choices. You can use the "ENERGIZER ULTIMATE LITHIUM" batteries which can still work well in extreme cold conditions, or you can use my method (or variation of it) as shown below.
(ps) Still looking for people to join the Christmas gift exchange. http://www.findmall.com/read.php?79,2122725,2122725#msg-2122725
(ps) Still looking for people to join the Christmas gift exchange. http://www.findmall.com/read.php?79,2122725,2122725#msg-2122725