I have the no flash cudde. In the warm months I can go 4 to 6 weeks depending on how many pictures, the biggest eater on batteries in these cuddes is when they take there video's. Longer the video the more battery your going to use up. In the cold months I don't care what camera brand you have, they will all eat up batteries. Changing batteries is simple, not a big deal or issue with me. Mega pixels are 3.0 during the day and 1.3 at night with the no flash cuddeback.