I like the Outdoor camera with the battery, but find it is too big for birdhouses, etc. I need the battery (and solar panel) since I have no electricity where I need to place some of them. Is there a camera where the battery is not attached? Or can we remove some of the bulky exterior housing?
Welcome to the Wyze User Community Forum @quentinhendry! 
The only battery operated Cam option from Wyze is the Wyze Cam Outdoor. All others require constant power from the plug-in power adapter. Wyze also does not offer any type of external battery bank to power their plug-in cams.
The V3 is about as small as it gets.
You may want to check out posts and topics by @TomG. Very active with birdhouse cams.
I would also consider mounting that battery pack with the female ports pointing downward so that water doesn’t pool on it and slip inside there.

