There you go, I think the rate of discharge went down a little bit inline with the 2A alkaline discharge curves I have seen.
You can't tell exactly by the chart, but all updates are up to today (Jan 29) Master is at 2.88V, JP is at 3.027V and Magy is at 2.979V.
I think I'll call this a success since looks like I'm en route to last at least the 6months that was my original goal.
By the way, I added a Si7021 sensor to the "master" node and it now reports temperature and humidity every 3minutes. It also has now a magnetic window sensor that it monitors via a pin interrupt to report open/closed state of a window.
I'll try to find time to document all this project for the contest, here is an screenshoot of the web UI that I'm using to control the whole thing.
It controls 5 independent AC units, three are running on batteries and two are wall powered. The interface scales very well to desktop/mobile so I can control my ACs from anywhere on the internet.
One of those nodes can also controls a Lutron IR wall switch. Another one has a natural gas sensor. And most of them have temperature/humidity sensors.