I can't help with battery heat but I bet there is something. You already have the link to the cameras, thanks
@drstratton I find them invaluable especially when making certain that everyone has roosted at night. I did not want to run electricity to the coop and so got these. Fast forward ahead I have an extension cord running to the coop for the heated water.
No matter, it is still easier to freely mount the cameras so I can cover all areas when I want. You can have them motion activated or you can turn them on manually via the app and look in. When watching live on the app you can record video or take photos. You get 1 month of free picture and video storage.
I always advice you to buy your cameras up front in a package as they are more expensive to add later. I want sure they would work so I only bought a couple originally. I paid more later.