Is higher Hz and higher samples always more accurate?
Does it shorten battery life?
I am trying to monitor my building’s 230VAC for a whole week, logging to SD card.
Just got my Mooshimeter, the included batteries were “62%” and firmware upgrading was repeating and failing, after replacing the batteries, I measured the included batteries were at 1.28V. (the fresh alkalines measured slightly over 1.6V), when it booted up with fresh batteries, it reported the firmware as already current.

After initial tests, I am also disappointed that the log-to-microsdcard isn’t respecting the interval that I set. I choose the max which is 10 minutes (600s), but the csv I got showed that it was logging every 10 seconds instead.