diff --git a/homeassistant/components/homekit_controller/sensor.py b/homeassistant/components/homekit_controller/sensor.py
index d7230de0832..5803b8aa839 100644
--- a/homeassistant/components/homekit_controller/sensor.py
+++ b/homeassistant/components/homekit_controller/sensor.py
@@ -466,21 +466,23 @@ class HomeKitBatterySensor(HomeKitSensor):
     @property
     def icon(self) -> str:
         """Return the sensor icon."""
-        if not self.available or self.state is None:
+        native_value = self.native_value
+        if not self.available or native_value is None:
             return "mdi:battery-unknown"
 
         # This is similar to the logic in helpers.icon, but we have delegated the
         # decision about what mdi:battery-alert is to the device.
         icon = "mdi:battery"
-        if self.is_charging and self.state > 10:
-            percentage = int(round(self.state / 20 - 0.01)) * 20
+        is_charging = self.is_charging
+        if is_charging and native_value > 10:
+            percentage = int(round(native_value / 20 - 0.01)) * 20
             icon += f"-charging-{percentage}"
-        elif self.is_charging:
+        elif is_charging:
             icon += "-outline"
         elif self.is_low_battery:
             icon += "-alert"
-        elif self.state < 95:
-            percentage = max(int(round(self.state / 10 - 0.01)) * 10, 10)
+        elif native_value < 95:
+            percentage = max(int(round(native_value / 10 - 0.01)) * 10, 10)
             icon += f"-{percentage}"
 
         return icon