Avatto ME168 TRV high battery drain

Hi, all,

I have several Avatto ME168 zigbee TRVs. Most of them are fine but one keeps draining the batteries in a matter of weeks. I have a couple of hypothesis:
a) the TRV is faulty
b) this valve moves more than others which is the case because the windows open and close more (I have an automation to close the valve if the one of the windows in the room opens).

BTW none of these TRVs report low battery status – they simply become unavailable when the battery dies.

This is at a remote home so I can’t swap batteries at will and it’s annoying to have to change them often anyway.

Any other users with similar experience? What was the root cause? What was the remedy?