I read some other threads (e.g. SmartThings Multipurpose Sensor Battery) and learned that the issue is mechanical, not electrical. I compared my cheepo “EBL” batteries with the Panasonic and don’t see a mechanical difference. I put one of these new EBL batteries in another multisensor that needed a new battery and that one is happy about it. There must be something else going on with the first sensor.