Environment
Home Assistant, USB Zigbee coordinator and ten battery-powered sensors.
What happens
Several sensors repeatedly rejoin and consume new coin cells within days.
What I have tried
Replaced batteries with reputable cells and updated coordinator firmware.
I would appreciate advice on how to identify the root cause without risking existing data or configuration.
Verified community troubleshooting
The logs and behaviour point in the same direction here.
Likely cause: Weak mesh coverage forces sleepy end devices to retry transmissions continuously.
What I would try: Add powered Zigbee routers, move the coordinator away from USB 3 interference and choose a channel clear of the Wi-Fi network.
Document the original value before changing it and restore it if the symptom remains.