I purchased my IR4 last summer. I used it all fall and winter. Just visited it in the swamp this weekend to pull the card and put in some fresh cells. It had been running the same set of energizer batteries since February. I was surprised to see it was still running. Thought for sure the batteries would be long dead.
I don't have exact number, but I believe the pic count on those batteries was around 1,500 images.
Some random comments.
IR range is average to slightly below average. 15 to 20 feet is about it. Have trees to bounce the light helps.
IR distance drops way off with near zero and sub zero temps because of the alkaline batteries I used.
Sub zero temps caused the IR filter to stick some times.
Trigger speed is so so. It does best over a food source. I have a salt lick on mine. I also put down some acorns this winter.
Pic quality is ok.
Batter life is really quite good. I suspect the IR range and poor cold weather performance could be improved with NiMH batteries.
Overall, I am pleased with the IR4 when using it within it's limitation. When placed over a food source/bait is where the IR4 is best suited. Above average battery helps to offset the other lesser qualities of this cam.
The IR4 is all set over my salt lick spot. I put my reconyx further in the swamp on a trail where it can do what it does best. Can't wait to see how both cams are doing in a couple months.