@Catham_Joker Batteries will drain faster than normal on Zigbee End Devices (i.e. battery-powered devices) if you either have problems with EMF/RMI/EMI interference or you do not have enough “Zigbee Router” devices (i.e. mains-powered devices that act as Zigbee repeaters/extenders), both causes reception issues so communication messages need to be resent which drains the battery quicker than usual. Read and follow all these tips to resolve it + replace batteries once more when done so to be sure have fixed the root cause: