I have this flow to let me know when a device battery is low and might need changing:
It produces these kinds of results:
But, when I take the batteries out, (e.g. Popp radiator valve), they still have plenty of charge and indeed when I look at the insights for this device, it looks as though it was only drained to 67% not 3%:
What’s the most reliable way to monitor battery without flows for each device?