diff --git a/devices/base.py b/devices/base.py
index 40343e7..e11bff5 100644
--- a/devices/base.py
+++ b/devices/base.py
@@ -6,8 +6,6 @@ from base import videv_base
 import json
 import time
 
-BATTERY_WARN_LEVEL = 10
-
 
 def is_json(data):
     try:
@@ -29,11 +27,9 @@ class base(mqtt_base):
     RX_IGNORE_TOPICS = []
     RX_IGNORE_KEYS = []
     RX_FILTER_DATA_KEYS = []
-    #
-    KEY_WARNING = '__WARNING__'
 
     def __init__(self, mqtt_client, topic):
-        super().__init__(mqtt_client, topic, default_values=dict.fromkeys(self.RX_KEYS + [self.KEY_WARNING]))
+        super().__init__(mqtt_client, topic, default_values=dict.fromkeys(self.RX_KEYS))
         # data storage
         # initialisations
         mqtt_client.add_callback(topic=self.topic, callback=self.receive_callback)
@@ -44,7 +40,7 @@ class base(mqtt_base):
     def set(self, key, data, block_callback=[]):
         if key in self.RX_IGNORE_KEYS:
             pass    # ignore these keys
-        elif key in self.RX_KEYS or key == self.KEY_WARNING:
+        elif key in self.RX_KEYS:
             return super().set(key, data, block_callback)
         else:
             self.logger.warning("Unexpected key %s", key)
@@ -105,24 +101,3 @@ class base(mqtt_base):
                     self.mqtt_client.send('/'.join([self.topic, key, self.TX_TOPIC] if len(self.TX_TOPIC) > 0 else [self.topic, key]), data)
         else:
             self.logger.error("Unknown tx toptic. Set TX_TOPIC of class to a known value")
-
-
-class warning(dict):
-    TYPE_BATTERY_LOW = 1
-    TYPE_OVERTEMPERATURE = 2
-    #
-    KEY_ID = 'id'
-    KEY_TYPE = 'type'
-    KEY_TEXT = 'text'
-    KEY_TM = 'tm'
-
-    def __init__(self, identification, type, text, args):
-        super().__init__({
-            self.KEY_ID: identification,
-            self.KEY_TYPE: type,
-            self.KEY_TEXT: text % args,
-            self.KEY_TM: time.localtime(),
-        })
-
-    def __str__(self):
-        return time.asctime(self.get(self.KEY_TM)) + ": " + self[self.KEY_TEXT] + " - " + self[self.KEY_ID]
diff --git a/devices/brennenstuhl.py b/devices/brennenstuhl.py
index 6675418..e6fa64d 100644
--- a/devices/brennenstuhl.py
+++ b/devices/brennenstuhl.py
@@ -2,8 +2,6 @@
 # -*- coding: utf-8 -*-
 #
 from devices.base import base
-from devices.base import BATTERY_WARN_LEVEL
-from devices.base import warning
 import json
 
 
@@ -53,27 +51,11 @@ class brennenstuhl_heatingvalve(base):
         super().__init__(mqtt_client, topic)
         self.mqtt_client.send(self.topic + '/' + self.TX_TOPIC, json.dumps({self.KEY_WINDOW_DETECTION: "ON",
                               self.KEY_CHILD_LOCK: "UNLOCK", self.KEY_VALVE_DETECTION: "ON", self.KEY_SYSTEM_MODE: "heat", self.KEY_PRESET: "manual"}))
-        #
-        self.add_callback(self.KEY_BATTERY, None, self.__warning__, True)
-        self.__battery_warning__ = False
 
     def __state_logging__(self, inst, key, data):
         if key in [self.KEY_HEATING_SETPOINT, self.KEY_CHILD_LOCK, self.KEY_WINDOW_DETECTION, self.KEY_VALVE_DETECTION]:
             self.logger.info("State change of '%s' to '%s'", key, repr(data))
 
-    #
-    # WARNING CALL
-    #
-    def __warning__(self, client, key, data):
-        if data <= BATTERY_WARN_LEVEL:
-            if not self.__battery_warning__:
-                self.__battery_warning__ = True
-                w = warning(self.topic, warning.TYPE_BATTERY_LOW, "Battery low (%.1f%%)", data)
-                self.logger.warning(w)
-                self.set(self.KEY_WARNING, w)
-        else:
-            self.__battery_warning__ = False
-
     #
     # RX
     #
diff --git a/devices/shelly.py b/devices/shelly.py
index dc466da..3b937e1 100644
--- a/devices/shelly.py
+++ b/devices/shelly.py
@@ -2,7 +2,6 @@
 # -*- coding: utf-8 -*-
 #
 from devices.base import base
-from devices.base import warning
 import logging
 import task
 
@@ -69,8 +68,6 @@ class shelly(base):
         self.delayed_flash_task = task.delayed(0.3, self.flash_task)
         self.delayed_off_task = task.delayed(0.3, self.off_task)
         #
-        self.add_callback(self.KEY_OVERTEMPERATURE, True, self.__warning__, True)
-        #
         self.all_off_requested = False
 
     def __state_logging__(self, inst, key, data):
@@ -93,14 +90,6 @@ class shelly(base):
     def flash_active(self):
         return self.output_key_delayed is not None
 
-    #
-    # WARNING CALL
-    #
-    def __warning__(self, client, key, data):
-        w = warning(self.topic, warning.TYPE_OVERTEMPERATURE, "Temperature to high (%.1f°C)", self.get(self.KEY_TEMPERATURE) or math.nan)
-        self.logger.warning(w)
-        self.set(self.KEY_WARNING, w)
-
     #
     # RX
     #
diff --git a/devices/silvercrest.py b/devices/silvercrest.py
index d0c75ef..5f926a3 100644
--- a/devices/silvercrest.py
+++ b/devices/silvercrest.py
@@ -2,7 +2,6 @@
 # -*- coding: utf-8 -*-
 #
 from devices.base import base
-from devices.base import warning
 import logging
 
 
@@ -89,21 +88,11 @@ class silvercrest_motion_sensor(base):
 
     def __init__(self, mqtt_client, topic):
         super().__init__(mqtt_client, topic)
-        #
-        self.add_callback(self.KEY_BATTERY_LOW, True, self.__warning__, True)
 
     def __state_logging__(self, inst, key, data):
         if key in [self.KEY_OCCUPANCY, self.KEY_UNMOUNTED]:
             self.logger.info("State change of '%s' to '%s'", key, repr(data))
 
-    #
-    # WARNING CALL
-    #
-    def __warning__(self, client, key, data):
-        w = warning(self.topic, warning.TYPE_BATTERY_LOW, "Battery low (%.1f%%)", self.get(self.KEY_BATTERY) or math.nan)
-        self.logger.warning(w)
-        self.set(self.KEY_WARNING, w)
-
     #
     # RX
     #
diff --git a/devices/tradfri.py b/devices/tradfri.py
index af4a9f7..bbef409 100644
--- a/devices/tradfri.py
+++ b/devices/tradfri.py
@@ -2,8 +2,6 @@
 # -*- coding: utf-8 -*-
 #
 from devices.base import base
-from devices.base import BATTERY_WARN_LEVEL
-from devices.base import warning
 import logging
 
 
@@ -180,26 +178,11 @@ class tradfri_button(base):
 
     def __init__(self, mqtt_client, topic):
         super().__init__(mqtt_client, topic)
-        #
-        self.add_callback(self.KEY_BATTERY, None, self.__warning__, True)
-        self.__battery_warning__ = False
 
     def __state_logging__(self, inst, key, data):
         if key in [self.KEY_ACTION]:
             self.logger.info("Input '%s' with '%s'", key, repr(data))
 
-    #
-    # WARNING CALL
-    #
-    def __warning__(self, client, key, data):
-        if data <= BATTERY_WARN_LEVEL:
-            if not self.__battery_warning__:
-                w = warning(self.topic, warning.TYPE_BATTERY_LOW, "Battery low (%.1f%%)", data)
-                self.logger.warning(w)
-                self.set(self.KEY_WARNING, w)
-        else:
-            self.__battery_warning__ = False
-
     #
     # RX
     #