I use AA rechargeables in all my cams. All of my cams are homemade though.
I have one set of 4 alkaline batteries for the PIR sensor- these last all year long.
I use 2 AA rechargeables for the cam. I get about 800-1000pics out of these batteries. Usually about a 3 week period. Cold weather also affects the life.
I am interested in your homemade cams, can you describe the setup, where you get the equipment, what it's made out of and how much you've spent to build them. Pics would be awesome too! Very curious as this would be something to work on in the garage during those lonely winter months after hunting season. hmmm
"I enjoy and become completely immersed in the challenge and the increased opportunity to become for a time a part of nature. Deer hunting is a classical exercise in freedom. It�s a return to fundamentals that I distinctly feel are basic and right"-F.B.