diff --git a/homeassistant/components/demo/vacuum.py b/homeassistant/components/demo/vacuum.py
index 38019cff3c1..11bf3e3118b 100644
--- a/homeassistant/components/demo/vacuum.py
+++ b/homeassistant/components/demo/vacuum.py
@@ -19,10 +19,7 @@ from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback
 SUPPORT_MINIMAL_SERVICES = VacuumEntityFeature.TURN_ON | VacuumEntityFeature.TURN_OFF
 
 SUPPORT_BASIC_SERVICES = (
-    VacuumEntityFeature.STATE
-    | VacuumEntityFeature.START
-    | VacuumEntityFeature.STOP
-    | VacuumEntityFeature.BATTERY
+    VacuumEntityFeature.STATE | VacuumEntityFeature.START | VacuumEntityFeature.STOP
 )
 
 SUPPORT_MOST_SERVICES = (
@@ -31,7 +28,6 @@ SUPPORT_MOST_SERVICES = (
     | VacuumEntityFeature.STOP
     | VacuumEntityFeature.PAUSE
     | VacuumEntityFeature.RETURN_HOME
-    | VacuumEntityFeature.BATTERY
     | VacuumEntityFeature.FAN_SPEED
 )
 
@@ -46,7 +42,6 @@ SUPPORT_ALL_SERVICES = (
     | VacuumEntityFeature.SEND_COMMAND
     | VacuumEntityFeature.LOCATE
     | VacuumEntityFeature.STATUS
-    | VacuumEntityFeature.BATTERY
     | VacuumEntityFeature.LOCATE
     | VacuumEntityFeature.MAP
     | VacuumEntityFeature.CLEAN_SPOT
@@ -90,12 +85,6 @@ class StateDemoVacuum(StateVacuumEntity):
         self._attr_activity = VacuumActivity.DOCKED
         self._fan_speed = FAN_SPEEDS[1]
         self._cleaned_area: float = 0
-        self._battery_level = 100
-
-    @property
-    def battery_level(self) -> int:
-        """Return the current battery level of the vacuum."""
-        return max(0, min(100, self._battery_level))
 
     @property
     def fan_speed(self) -> str:
@@ -117,7 +106,6 @@ class StateDemoVacuum(StateVacuumEntity):
         if self._attr_activity != VacuumActivity.CLEANING:
             self._attr_activity = VacuumActivity.CLEANING
             self._cleaned_area += 1.32
-            self._battery_level -= 1
             self.schedule_update_ha_state()
 
     def pause(self) -> None:
@@ -142,7 +130,6 @@ class StateDemoVacuum(StateVacuumEntity):
         """Perform a spot clean-up."""
         self._attr_activity = VacuumActivity.CLEANING
         self._cleaned_area += 1.32
-        self._battery_level -= 1
         self.schedule_update_ha_state()
 
     def set_fan_speed(self, fan_speed: str, **kwargs: Any) -> None:
diff --git a/tests/components/demo/test_vacuum.py b/tests/components/demo/test_vacuum.py
index f910e6e53ac..3a627efd3f1 100644
--- a/tests/components/demo/test_vacuum.py
+++ b/tests/components/demo/test_vacuum.py
@@ -14,7 +14,6 @@ from homeassistant.components.demo.vacuum import (
     FAN_SPEEDS,
 )
 from homeassistant.components.vacuum import (
-    ATTR_BATTERY_LEVEL,
     ATTR_COMMAND,
     ATTR_FAN_SPEED,
     ATTR_FAN_SPEED_LIST,
@@ -67,36 +66,31 @@ async def setup_demo_vacuum(hass: HomeAssistant, vacuum_only: None):
 async def test_supported_features(hass: HomeAssistant) -> None:
     """Test vacuum supported features."""
     state = hass.states.get(ENTITY_VACUUM_COMPLETE)
-    assert state.attributes.get(ATTR_SUPPORTED_FEATURES) == 16380
-    assert state.attributes.get(ATTR_BATTERY_LEVEL) == 100
+    assert state.attributes.get(ATTR_SUPPORTED_FEATURES) == 16316
     assert state.attributes.get(ATTR_FAN_SPEED) == "medium"
     assert state.attributes.get(ATTR_FAN_SPEED_LIST) == FAN_SPEEDS
     assert state.state == VacuumActivity.DOCKED
 
     state = hass.states.get(ENTITY_VACUUM_MOST)
-    assert state.attributes.get(ATTR_SUPPORTED_FEATURES) == 12412
-    assert state.attributes.get(ATTR_BATTERY_LEVEL) == 100
+    assert state.attributes.get(ATTR_SUPPORTED_FEATURES) == 12348
     assert state.attributes.get(ATTR_FAN_SPEED) == "medium"
     assert state.attributes.get(ATTR_FAN_SPEED_LIST) == FAN_SPEEDS
     assert state.state == VacuumActivity.DOCKED
 
     state = hass.states.get(ENTITY_VACUUM_BASIC)
-    assert state.attributes.get(ATTR_SUPPORTED_FEATURES) == 12360
-    assert state.attributes.get(ATTR_BATTERY_LEVEL) == 100
+    assert state.attributes.get(ATTR_SUPPORTED_FEATURES) == 12296
     assert state.attributes.get(ATTR_FAN_SPEED) is None
     assert state.attributes.get(ATTR_FAN_SPEED_LIST) is None
     assert state.state == VacuumActivity.DOCKED
 
     state = hass.states.get(ENTITY_VACUUM_MINIMAL)
     assert state.attributes.get(ATTR_SUPPORTED_FEATURES) == 3
-    assert state.attributes.get(ATTR_BATTERY_LEVEL) is None
     assert state.attributes.get(ATTR_FAN_SPEED) is None
     assert state.attributes.get(ATTR_FAN_SPEED_LIST) is None
     assert state.state == VacuumActivity.DOCKED
 
     state = hass.states.get(ENTITY_VACUUM_NONE)
     assert state.attributes.get(ATTR_SUPPORTED_FEATURES) == 0
-    assert state.attributes.get(ATTR_BATTERY_LEVEL) is None
     assert state.attributes.get(ATTR_FAN_SPEED) is None
     assert state.attributes.get(ATTR_FAN_SPEED_LIST) is None
     assert state.state == VacuumActivity.DOCKED
@@ -116,7 +110,6 @@ async def test_methods(hass: HomeAssistant) -> None:
 
     state = hass.states.get(ENTITY_VACUUM_COMPLETE)
     await hass.async_block_till_done()
-    assert state.attributes.get(ATTR_BATTERY_LEVEL) == 100
     assert state.state == VacuumActivity.DOCKED
 
     await async_setup_component(hass, "notify", {})