The solution I found that worked for 2 different devices: Once you get the low battery thing, it's convinced it's low battery even if you change them. Remove the device from your app. Disconnect it...

@Wayne-TP Any chance that I can get help too?

I'm also getting this fault. Tried new and tested batteries. Is it just a case of disconnecting them and reconnecting them several times? Have tried 3 times so far....