I’ve now had five cameras drain within 3 months. 3 internal ones might trigger once a month and the externals twice a day for 5 seconds.
What I do notice is that the “Last Updated” Status (presume firmware) is always upto date within the last few seconds of looking at it and the red light on the internal cameras flash regularly even when not armed.
I suspect my cameras are constantly seeking to download and that is what drains my battery. Can’t find a way of stopping it.
They are also all within a few feet of one of the router ir satellite and I have two sync modules to separate the external and internal cameras.