I'm using the 12 volt 300 series Energizer battery, purchased at Wal Mart.
These are the same batteries that are used in a ride on lawnmower. They come
in 160, 200 and 300 series. I place the battery on a piece of 3/8 or 1/2 inch
plywood the size of the base of the battery. The reason for this is so the battery
won't freeze to the ground. I check the battery power, usually twice a week when I swap out my SD cards, using a multi meter. Some of these batteries have been out since early September and are still out. I have them connected to the early version of Wildview EZ cam and also 7.0 Spy-Point. I've had the batteries totally covered in snow with no problem of shorting out. A heavy buildup of ice will cause a short however.
I'm from southern Manitoba, cold weather area. The batteries stand up really
well with the Wildview. As for the 7.0 Spy-Point that is another story. Some fault
in those cameras, I have two, will kill the battery in less than a week. I am still
doing testing to try and pin point the problem. I contacted the manufacture with
what info I could provide and was given a return authorization number. These two
cameras will work in warmer weather, not at low temperatures as they claim. I am
doing more testing before returning them to further help pin point the problem. When they work they give excellent pictures or videos, depending what they are set for.
If you live in a cold weather area or plan to use them in that type of area, by all means go to the 12 volt system. Not all cameras have the 12 volt port, but I think
if you teamed up with some one in the electronic field they could build an adapter or
reduce the power out put to the camera and still use a 12 volt battery.