diff --git a/kasa/device.py b/kasa/device.py
index 3cc21381..3c38b544 100644
--- a/kasa/device.py
+++ b/kasa/device.py
@@ -302,7 +302,7 @@ class Device(ABC):
         """Return the list of supported features."""
         return self._features
 
-    def add_feature(self, feature: Feature):
+    def _add_feature(self, feature: Feature):
         """Add a new feature to the device."""
         desc_name = feature.name.lower().replace(" ", "_")
         if desc_name in self._features:
diff --git a/kasa/iot/iotdevice.py b/kasa/iot/iotdevice.py
index 3d7b3ac1..85d95653 100755
--- a/kasa/iot/iotdevice.py
+++ b/kasa/iot/iotdevice.py
@@ -308,18 +308,18 @@ class IotDevice(Device):
         self._set_sys_info(self._last_update["system"]["get_sysinfo"])
 
     async def _initialize_features(self):
-        self.add_feature(
+        self._add_feature(
             Feature(
                 device=self, name="RSSI", attribute_getter="rssi", icon="mdi:signal"
             )
         )
-        self.add_feature(
+        self._add_feature(
             Feature(
                 device=self, name="Time", attribute_getter="time", show_in_hass=False
             )
         )
         if "on_time" in self._sys_info:
-            self.add_feature(
+            self._add_feature(
                 Feature(
                     device=self,
                     name="On since",
@@ -344,7 +344,7 @@ class IotDevice(Device):
                 if module.is_supported:
                     supported[module._module] = module
                 for module_feat in module._module_features.values():
-                    self.add_feature(module_feat)
+                    self._add_feature(module_feat)
 
             self._supported_modules = supported
 
diff --git a/kasa/iot/iotplug.py b/kasa/iot/iotplug.py
index 17b30a2a..5182b10c 100644
--- a/kasa/iot/iotplug.py
+++ b/kasa/iot/iotplug.py
@@ -57,7 +57,7 @@ class IotPlug(IotDevice):
         self.add_module("time", Time(self, "time"))
         self.add_module("cloud", Cloud(self, "cnCloud"))
 
-        self.add_feature(
+        self._add_feature(
             Feature(
                 device=self,
                 name="LED",
diff --git a/kasa/smart/smartdevice.py b/kasa/smart/smartdevice.py
index 9bb75350..c9358df6 100644
--- a/kasa/smart/smartdevice.py
+++ b/kasa/smart/smartdevice.py
@@ -133,7 +133,7 @@ class SmartDevice(Device):
 
     async def _initialize_features(self):
         """Initialize device features."""
-        self.add_feature(
+        self._add_feature(
             Feature(
                 self,
                 "Signal Level",
@@ -141,7 +141,7 @@ class SmartDevice(Device):
                 icon="mdi:signal",
             )
         )
-        self.add_feature(
+        self._add_feature(
             Feature(
                 self,
                 "RSSI",
@@ -149,17 +149,17 @@ class SmartDevice(Device):
                 icon="mdi:signal",
             )
         )
-        self.add_feature(
+        self._add_feature(
             Feature(
                 device=self, name="Time", attribute_getter="time", show_in_hass=False
             )
         )
-        self.add_feature(
+        self._add_feature(
             Feature(device=self, name="SSID", attribute_getter="ssid", icon="mdi:wifi")
         )
 
         if "overheated" in self._info:
-            self.add_feature(
+            self._add_feature(
                 Feature(
                     self,
                     "Overheated",
@@ -172,7 +172,7 @@ class SmartDevice(Device):
         # We check for the key available, and not for the property truthiness,
         # as the value is falsy when the device is off.
         if "on_time" in self._info:
-            self.add_feature(
+            self._add_feature(
                 Feature(
                     device=self,
                     name="On since",