marvinroger
commented
6 years ago I took the data from https://github.com/home-assistant/home-assistant/blob/46ea28a4f81b121967a4041a5baa5d34e0827ac7/homeassistant/components/xiaomi_aqara.py#L295
But you are right, in practice I don't have any 3.3V batteries. Thanks for that.
Most CR2032 come with around 3,0 to 3,1V, while specification allows up to 3,3V. My Magnet Sensor was still operating at 2,18V. Have changed the constants, 2,8V as min was far to high in my opinion and I think a max expectation far above 3V makes no sense either. Still left some buffer (2,35V min, 3,065V max), so I capped the percentage value to prevent going below 0 or above 100.