i've had it for a year. just want to get all the life out of it. i'm changing over to digitals trail cams now i have played with them.i've got 1 old moultrie (battery life sux),1 d40, and 1 i40. on the old 2.1 moultrie is there away to get better battery life?with the cold weather i'm lucky to get a day with the 6 volt and solar panel?