onion721: I have 3 of the Moultrie GameSpy D55-IR. I am using rechargeable batteries: Pure Energy which test 1.55 volt out of the package. These are manufactured in Canada and sold in most Walmart stores. I am also using Energizer rechargeable which vary from 1.2 to 1.3 out of the package. These will recharge upto 1.38 volt. Moultrie offers a software upgrade to shorten video delay time.
These cameras take excellent pictures, and when set to video, they take one picture, then a video. Night video is limited to 10 second. I contacted Moultrie, and they have no plans to upgrade to a longer night video because this would require more battery power. These cameras have excellent battery life. Moultrie gave me excellent customer service. This camera has a 12 volt external port: located on the bottom right hand side when facing the camera.
I would have liked a longer (30 second) night video.
What model camera are you using?