Samsung Smartsense Multi-purpose sensor reliability

Hi all,

I’ve read other people are having problems with these Samsung Smartsense Zigbee Multifunction door sensors which I think were launched in 2018 - my sensor (one of 4 I bought) kept going offline recently - it may have been caused by RF interference but it sprang into action today which is odd a day after replacing the battery…

Since then the battery has gone from 100% to 68% in less than 24 hours:

|2019-04-14 2:24 PM UTC - 4 hours ago|battery|68||
|2019-04-14 4:44 AM UTC - 14 hours ago|battery|78||
|2019-04-13 11:19 AM UTC - 1 day ago|battery|100|

Any suggestions? Thanks