Eddie,
I buy the Rayovac twin pack at Walmart, it costs like $4.97, and you can't even get one Energizer for that. I think Moultrie sells a rechargable system for their cameras and feeding systems but I am not sure of the cost. I am getting just over a week's worth of photos but it really depends on how often the camera is working because at times I only get 3 or 4 days but I have about 100 to 150 photos. The more the flash has to work, the quicker the battery is going to die. My friends and I all buy these batteries and just know all things come into account on battery life. Whenever I happen to be at Walmart, I make it a purposeto get a couple of batteries and I go to Wally-world alot. Under normal photo opportunities (daytime photos, 4 - 6 a day during the season), I do get about 2 weeks work out of the batteries. So you can see that several conditions work on the life of your batteries. I know that having rechargable batteries also makes it to where you don't have to go to the hunting club every weekend, like some of my friends who have to drive for a couple of hours, but I'm one of the fortunate one who has deer on his property and the camera is within 200 yards of his back door and my club is only 15 minutes away. I would check with Basspro Shops, or my local sporting goods store. I'm not sure what state you are in, I'm in "Bama", but there is a retail outfit here called Academy Sports and they have a lot of different things for hunting and they can be competitive with Walmart. Check it out and see. Oh, I bought the Game Watcher 2.1 yesterday and put it out, and I already have photos, plus Moultrie changed the strapping system to bungy cords which is easier to work with. Good hunting.