I noticed a pretty big difference in the SG last year using Lithiums when it got cold but it takes AA's. This is my first year with Cudde Captures and they take C's and I don't even know if they make Lithiums in C's and D's yet. Couldn't find any last year when using D's in a Moultrie M60. I was planning on checking this week but not in a rush cus I just put new alkaline duracells in both my Captures about 3weeks ago and wanted to see how they did in the cold. Tonight will be another good test with the freezing rain we're supposed to get.