That’s a good question. I am not aware that any testers tried such a long term time lapse. In looking at the app, the longest duration is currently 30 days and the longest interval between shots is 10 minutes. There are some preset time lapses in the app and you will see them once they roll that out to production next month. But, I cannot and will not give any more details for the time being. So please do not ask.
I will, however, run a 2 day test, with a 10 minute interval on my beta WCO for my own curiosity. The battery level is currently at 91%. Once the test is done, I will provide the battery use and the file size. The camera is currently viewing my backyard from the back of the lot. There is not a lot of action back there, so whatever gets recorded will be pretty boring.