I am using 2 AA batteries R6L4B AA penlite from Philips which are advertised as having being long life.
I have two sonoff sensors indoors and those have been running off of their original cells, while this outdoor sensor has gone through 2 cells, and almost 4 batteries.
Is there something wrong with my setup, or is the sensor broken ?
I’ve got a SNZB-02 that is also draining batteries in a matter of days. I pulled it out of service and set it aside to monitor. It keeps draining batteries. I’ve concluded it’s CC2530 chip has a problem.
Here is a history of my battery levels showing the single CR123A setup in yellow and the double CR123A in blue. The single battery was put in new about 3 months before the double battery was installed. They used batteries from the same batch but it is possible that they were not all in good condition. The single battery reported 100% initially but over the first 15 days dropped down to around a steady 60% where it remained. The double battery setup was initially above 70% when setup inside but dropped when put outside.
The initial drop of the double battery install from about 75% down to 30% is when the sensor was moved from the inside location to outside. However, only recovering to about 50% after that makes me think that one of the batteries in the group may have been bad and the two batteries then tried to reach a charge equilibrium. Since not initially reading 100% or close, is also an indication that one or both the batteries were not in the best shape.
Temperature change appears to influence the readings as they went up by over 10% during the summer and drop substantially during the colder periods. Here is the matching temps for the same time period as a comparison
In both cases, however, the lowest % were never under 30 whereas the CR2450 often and quickly dropped below this threshold in colder weather causing the sensor to disconnect.
