diff --git a/homeassistant/components/hue/sensor.py b/homeassistant/components/hue/sensor.py
index 80658fff21e..9bd701fe526 100644
--- a/homeassistant/components/hue/sensor.py
+++ b/homeassistant/components/hue/sensor.py
@@ -11,6 +11,7 @@ from homeassistant.const import (
     DEVICE_CLASS_BATTERY,
     DEVICE_CLASS_ILLUMINANCE,
     DEVICE_CLASS_TEMPERATURE,
+    ENTITY_CATEGORY_DIAGNOSTIC,
     LIGHT_LUX,
     PERCENTAGE,
     TEMP_CELSIUS,
@@ -95,6 +96,7 @@ class HueBattery(GenericHueSensor, SensorEntity):
     _attr_device_class = DEVICE_CLASS_BATTERY
     _attr_state_class = STATE_CLASS_MEASUREMENT
     _attr_native_unit_of_measurement = PERCENTAGE
+    _attr_entity_category = ENTITY_CATEGORY_DIAGNOSTIC
 
     @property
     def unique_id(self):
diff --git a/tests/components/hue/test_sensor_base.py b/tests/components/hue/test_sensor_base.py
index a639ca31113..8b8eb45a222 100644
--- a/tests/components/hue/test_sensor_base.py
+++ b/tests/components/hue/test_sensor_base.py
@@ -8,6 +8,8 @@ import pytest
 from homeassistant.components import hue
 from homeassistant.components.hue import sensor_base
 from homeassistant.components.hue.hue_event import CONF_HUE_EVENT
+from homeassistant.const import ENTITY_CATEGORY_DIAGNOSTIC
+from homeassistant.helpers.entity_registry import async_get
 from homeassistant.util import dt as dt_util
 
 from .conftest import create_mock_bridge, setup_bridge_for_sensors as setup_bridge
@@ -357,6 +359,12 @@ async def test_sensors(hass, mock_bridge):
     assert battery_remote_1.state == "100"
     assert battery_remote_1.name == "Hue dimmer switch 1 battery level"
 
+    ent_reg = async_get(hass)
+    assert (
+        ent_reg.async_get("sensor.hue_dimmer_switch_1_battery_level").entity_category
+        == ENTITY_CATEGORY_DIAGNOSTIC
+    )
+
 
 async def test_unsupported_sensors(hass, mock_bridge):
     """Test that unsupported sensors don't get added and don't fail."""