Battery usage update.
In the last two week I used my wireless Redox as my daily driver at work. This means that I use the keyboard 8 hours a day, 40 hours a week and shut it off before going home. It stays powered off during the weekend. I would say that my usage is medium-high since I have a keyboard-centric workflow (I use i3, vim and clion with vim plugin on my workstation), so take this into account.
I measured the battery voltage every weekend and these are the results:
|Left hand voltage||Right hand voltage|
I know I have not enough data but I will try to make a guesstimate anyway.
I would approximate the voltage drop to 0.02 V per week of usage. Looking at the CR2032 datasheet
we can assume a linear discharge down to 2.5 V.
With these data I estimate that a battery could last 25 weeks or 6 months (0.02 V drop per week starting from 3.0 V), in other words 1000 h of battery life. This is without considering that the MCUs are rated for a minimum 2.0 V operating voltage.
This seems pretty good actually.
Anyway I wouldn't take this estimate as definitive since I have not enough data yet. In the next two weeks I'll keep the battery monitored and report the usage.