I have 5 TRVs which control the our boiler using the Shelly 1 relay and some simple php on my local server. All was working fine, but I guess a number of the batteries went low over the summer and I didn't notice. Recharged the TRVs, a couple of them needed a factory reset and everything back and working. I also updated to the latest firmware (2.2.1). Since this time, just one of the TRVs is rapidly draining it's battery by a few % points per day whilst all the others are still on 100%.
WiFi signal is good (running from a repeater /network extender but don't see why that would make a difference) and no different settings from the other valves etc.
Is there any specific advice or diagnostics I should run to check the problem?
Thanks in advance....