It looks like it has something to do with the firmware. Just checked the historic data (see screenshot)
I updated deconz to 2.22 (DDF for Fyrur) just a few days after it came out. So like end of June. No changes.
I did not charge the batteries in the time range. But I updated to firmware at the time the battery values doubled. ID 47 is mising since then. That’s the device that’s missing the reading.
So maybe the / 2 need to be done with the latest firmware only?
https://ww8.ikea.com/ikeahomesmart/releasenotes/releasenotes.html
**FYRTUR and KADRILJ roller blinds (24.4.11)**
**Product ID: E1752, E1757**
◆ Optimised battery performance.
◆ Stability improvements.