Sorry I'm late to this thread. I have used the IR4 for some time now. The battery life is incredible. I have gotten about a month out of it the first time I used it. Next set of batteries I have still in there and I have been in there for some time. Some where close to 45 Days or so.
I got the S1.3 and it's battery life was around a week to 2 weeks.
I just recently got the X6C for the upcoming season and I have been testing it out on some birds that fly by. I normally get about 30 pictures of birds either flying by or eating some sunflower seeds the wife leaves for them.
I can't wait to get my hands on the new
Pulse Cameras. I really want to try out the new wifi stuff.