Ran a series of Cr2032 battery tests with our 2-part falcon tube loggers and was pleasantly surprised to find that even with the default BOD limiting us to the upper plateau of those cells; we can still expect about two years of run time from most name-brand batteries. https://thecavepearlproject.org/2023/06/05/testing-cr2032-battery-discharge-time-with-our-2-part-promini-loggers/

With a series of resistors on the digital pins, this little logger might be the easiest way to simulate duty cycles for other more complex devices that you can’t afford to lose a dozen of for the duration of long term tests. Also note the curves are a bit chunky because the internal vref trick only has a resolution of 11mv, and we use index compression that reduces the record further to 16mv/step.