Out of interest - how frequently were you logging and what was the Ah of your battery? I’m having issues with Enviro Urbans seemingly freezing at the point of trying to take a measurement, typically anywhere between 10-50 readings in - submitted here. I don’t think it’s the battery as it does something similar if I reset things and dont recharge the battery, but perhaps I’m wrong.
I made a few changes to the code to light the LEDs when measuring and to make 3 back-to-back measurements each start-up, but I would be very worried if these alone are causing the battery to drain too fast for an hour of measurements every 5 minutes (which I seem unable to acheive).