diff --git a/.strict-typing b/.strict-typing
index 87bef3033c4..e6f0f96368b 100644
--- a/.strict-typing
+++ b/.strict-typing
@@ -13,6 +13,7 @@ homeassistant.components.camera.*
 homeassistant.components.cover.*
 homeassistant.components.device_automation.*
 homeassistant.components.elgato.*
+homeassistant.components.fritzbox.*
 homeassistant.components.frontend.*
 homeassistant.components.geo_location.*
 homeassistant.components.gios.*
diff --git a/homeassistant/components/fritzbox/__init__.py b/homeassistant/components/fritzbox/__init__.py
index dc200195748..124719b93c1 100644
--- a/homeassistant/components/fritzbox/__init__.py
+++ b/homeassistant/components/fritzbox/__init__.py
@@ -17,14 +17,16 @@ from homeassistant.const import (
     CONF_USERNAME,
     EVENT_HOMEASSISTANT_STOP,
 )
-from homeassistant.core import HomeAssistant
+from homeassistant.core import Event, HomeAssistant
 from homeassistant.exceptions import ConfigEntryAuthFailed
+from homeassistant.helpers.entity import DeviceInfo
 from homeassistant.helpers.update_coordinator import (
     CoordinatorEntity,
     DataUpdateCoordinator,
 )
 
 from .const import CONF_CONNECTIONS, CONF_COORDINATOR, DOMAIN, LOGGER, PLATFORMS
+from .model import EntityInfo
 
 
 async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
@@ -63,7 +65,7 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
             data[device.ain] = device
         return data
 
-    async def async_update_coordinator():
+    async def async_update_coordinator() -> dict[str, FritzhomeDevice]:
         """Fetch all device data."""
         return await hass.async_add_executor_job(_update_fritz_devices)
 
@@ -81,7 +83,7 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
 
     hass.config_entries.async_setup_platforms(entry, PLATFORMS)
 
-    def logout_fritzbox(event):
+    def logout_fritzbox(event: Event) -> None:
         """Close connections to this fritzbox."""
         fritz.logout()
 
@@ -109,10 +111,10 @@ class FritzBoxEntity(CoordinatorEntity):
 
     def __init__(
         self,
-        entity_info: dict[str, str],
-        coordinator: DataUpdateCoordinator,
+        entity_info: EntityInfo,
+        coordinator: DataUpdateCoordinator[dict[str, FritzhomeDevice]],
         ain: str,
-    ):
+    ) -> None:
         """Initialize the FritzBox entity."""
         super().__init__(coordinator)
 
@@ -128,7 +130,7 @@ class FritzBoxEntity(CoordinatorEntity):
         return self.coordinator.data[self.ain]
 
     @property
-    def device_info(self):
+    def device_info(self) -> DeviceInfo:
         """Return device specific attributes."""
         return {
             "name": self.device.name,
@@ -139,21 +141,21 @@ class FritzBoxEntity(CoordinatorEntity):
         }
 
     @property
-    def unique_id(self):
+    def unique_id(self) -> str:
         """Return the unique ID of the device."""
         return self._unique_id
 
     @property
-    def name(self):
+    def name(self) -> str:
         """Return the name of the device."""
         return self._name
 
     @property
-    def unit_of_measurement(self):
+    def unit_of_measurement(self) -> str | None:
         """Return the unit of measurement."""
         return self._unit_of_measurement
 
     @property
-    def device_class(self):
+    def device_class(self) -> str | None:
         """Return the device class."""
         return self._device_class
diff --git a/homeassistant/components/fritzbox/binary_sensor.py b/homeassistant/components/fritzbox/binary_sensor.py
index 807ca41ca64..242e3d6e644 100644
--- a/homeassistant/components/fritzbox/binary_sensor.py
+++ b/homeassistant/components/fritzbox/binary_sensor.py
@@ -1,4 +1,6 @@
 """Support for Fritzbox binary sensors."""
+from __future__ import annotations
+
 from homeassistant.components.binary_sensor import (
     DEVICE_CLASS_WINDOW,
     BinarySensorEntity,
@@ -21,7 +23,7 @@ async def async_setup_entry(
     hass: HomeAssistant, entry: ConfigEntry, async_add_entities: AddEntitiesCallback
 ) -> None:
     """Set up the FRITZ!SmartHome binary sensor from ConfigEntry."""
-    entities = []
+    entities: list[FritzboxBinarySensor] = []
     coordinator = hass.data[FRITZBOX_DOMAIN][entry.entry_id][CONF_COORDINATOR]
 
     for ain, device in coordinator.data.items():
@@ -48,8 +50,8 @@ class FritzboxBinarySensor(FritzBoxEntity, BinarySensorEntity):
     """Representation of a binary FRITZ!SmartHome device."""
 
     @property
-    def is_on(self):
+    def is_on(self) -> bool:
         """Return true if sensor is on."""
         if not self.device.present:
             return False
-        return self.device.alert_state
+        return self.device.alert_state  # type: ignore [no-any-return]
diff --git a/homeassistant/components/fritzbox/climate.py b/homeassistant/components/fritzbox/climate.py
index 947a95a7a5b..c50e0d4f270 100644
--- a/homeassistant/components/fritzbox/climate.py
+++ b/homeassistant/components/fritzbox/climate.py
@@ -1,4 +1,8 @@
 """Support for AVM FRITZ!SmartHome thermostate devices."""
+from __future__ import annotations
+
+from typing import Any
+
 from homeassistant.components.climate import ClimateEntity
 from homeassistant.components.climate.const import (
     ATTR_HVAC_MODE,
@@ -34,6 +38,7 @@ from .const import (
     CONF_COORDINATOR,
     DOMAIN as FRITZBOX_DOMAIN,
 )
+from .model import ClimateExtraAttributes
 
 SUPPORT_FLAGS = SUPPORT_TARGET_TEMPERATURE | SUPPORT_PRESET_MODE
 
@@ -55,7 +60,7 @@ async def async_setup_entry(
     hass: HomeAssistant, entry: ConfigEntry, async_add_entities: AddEntitiesCallback
 ) -> None:
     """Set up the FRITZ!SmartHome thermostat from ConfigEntry."""
-    entities = []
+    entities: list[FritzboxThermostat] = []
     coordinator = hass.data[FRITZBOX_DOMAIN][entry.entry_id][CONF_COORDINATOR]
 
     for ain, device in coordinator.data.items():
@@ -82,53 +87,53 @@ class FritzboxThermostat(FritzBoxEntity, ClimateEntity):
     """The thermostat class for FRITZ!SmartHome thermostates."""
 
     @property
-    def supported_features(self):
+    def supported_features(self) -> int:
         """Return the list of supported features."""
         return SUPPORT_FLAGS
 
     @property
-    def available(self):
+    def available(self) -> bool:
         """Return if thermostat is available."""
-        return self.device.present
+        return self.device.present  # type: ignore [no-any-return]
 
     @property
-    def temperature_unit(self):
+    def temperature_unit(self) -> str:
         """Return the unit of measurement that is used."""
         return TEMP_CELSIUS
 
     @property
-    def precision(self):
+    def precision(self) -> float:
         """Return precision 0.5."""
         return PRECISION_HALVES
 
     @property
-    def current_temperature(self):
+    def current_temperature(self) -> float:
         """Return the current temperature."""
-        return self.device.actual_temperature
+        return self.device.actual_temperature  # type: ignore [no-any-return]
 
     @property
-    def target_temperature(self):
+    def target_temperature(self) -> float:
         """Return the temperature we try to reach."""
         if self.device.target_temperature == ON_API_TEMPERATURE:
             return ON_REPORT_SET_TEMPERATURE
         if self.device.target_temperature == OFF_API_TEMPERATURE:
             return OFF_REPORT_SET_TEMPERATURE
-        return self.device.target_temperature
+        return self.device.target_temperature  # type: ignore [no-any-return]
 
-    async def async_set_temperature(self, **kwargs):
+    async def async_set_temperature(self, **kwargs: Any) -> None:
         """Set new target temperature."""
-        if ATTR_HVAC_MODE in kwargs:
-            hvac_mode = kwargs.get(ATTR_HVAC_MODE)
+        if kwargs.get(ATTR_HVAC_MODE) is not None:
+            hvac_mode = kwargs[ATTR_HVAC_MODE]
             await self.async_set_hvac_mode(hvac_mode)
-        elif ATTR_TEMPERATURE in kwargs:
-            temperature = kwargs.get(ATTR_TEMPERATURE)
+        elif kwargs.get(ATTR_TEMPERATURE) is not None:
+            temperature = kwargs[ATTR_TEMPERATURE]
             await self.hass.async_add_executor_job(
                 self.device.set_target_temperature, temperature
             )
         await self.coordinator.async_refresh()
 
     @property
-    def hvac_mode(self):
+    def hvac_mode(self) -> str:
         """Return the current operation mode."""
         if (
             self.device.target_temperature == OFF_REPORT_SET_TEMPERATURE
@@ -139,11 +144,11 @@ class FritzboxThermostat(FritzBoxEntity, ClimateEntity):
         return HVAC_MODE_HEAT
 
     @property
-    def hvac_modes(self):
+    def hvac_modes(self) -> list[str]:
         """Return the list of available operation modes."""
         return OPERATION_LIST
 
-    async def async_set_hvac_mode(self, hvac_mode):
+    async def async_set_hvac_mode(self, hvac_mode: str) -> None:
         """Set new operation mode."""
         if hvac_mode == HVAC_MODE_OFF:
             await self.async_set_temperature(temperature=OFF_REPORT_SET_TEMPERATURE)
@@ -153,7 +158,7 @@ class FritzboxThermostat(FritzBoxEntity, ClimateEntity):
             )
 
     @property
-    def preset_mode(self):
+    def preset_mode(self) -> str | None:
         """Return current preset mode."""
         if self.device.target_temperature == self.device.comfort_temperature:
             return PRESET_COMFORT
@@ -162,11 +167,11 @@ class FritzboxThermostat(FritzBoxEntity, ClimateEntity):
         return None
 
     @property
-    def preset_modes(self):
+    def preset_modes(self) -> list[str]:
         """Return supported preset modes."""
         return [PRESET_ECO, PRESET_COMFORT]
 
-    async def async_set_preset_mode(self, preset_mode):
+    async def async_set_preset_mode(self, preset_mode: str) -> None:
         """Set preset mode."""
         if preset_mode == PRESET_COMFORT:
             await self.async_set_temperature(
@@ -176,19 +181,19 @@ class FritzboxThermostat(FritzBoxEntity, ClimateEntity):
             await self.async_set_temperature(temperature=self.device.eco_temperature)
 
     @property
-    def min_temp(self):
+    def min_temp(self) -> int:
         """Return the minimum temperature."""
         return MIN_TEMPERATURE
 
     @property
-    def max_temp(self):
+    def max_temp(self) -> int:
         """Return the maximum temperature."""
         return MAX_TEMPERATURE
 
     @property
-    def extra_state_attributes(self):
+    def extra_state_attributes(self) -> ClimateExtraAttributes:
         """Return the device specific state attributes."""
-        attrs = {
+        attrs: ClimateExtraAttributes = {
             ATTR_STATE_BATTERY_LOW: self.device.battery_low,
             ATTR_STATE_DEVICE_LOCKED: self.device.device_lock,
             ATTR_STATE_LOCKED: self.device.lock,
diff --git a/homeassistant/components/fritzbox/config_flow.py b/homeassistant/components/fritzbox/config_flow.py
index 50a9a5f0117..3ae3368f4ae 100644
--- a/homeassistant/components/fritzbox/config_flow.py
+++ b/homeassistant/components/fritzbox/config_flow.py
@@ -1,17 +1,22 @@
 """Config flow for AVM FRITZ!SmartHome."""
+from __future__ import annotations
+
+from typing import Any
 from urllib.parse import urlparse
 
 from pyfritzhome import Fritzhome, LoginError
 from requests.exceptions import HTTPError
 import voluptuous as vol
 
-from homeassistant import config_entries
 from homeassistant.components.ssdp import (
     ATTR_SSDP_LOCATION,
     ATTR_UPNP_FRIENDLY_NAME,
     ATTR_UPNP_UDN,
 )
+from homeassistant.config_entries import ConfigEntry, ConfigFlow
 from homeassistant.const import CONF_HOST, CONF_PASSWORD, CONF_USERNAME
+from homeassistant.data_entry_flow import FlowResult
+from homeassistant.helpers.typing import DiscoveryInfoType
 
 from .const import DEFAULT_HOST, DEFAULT_USERNAME, DOMAIN
 
@@ -36,22 +41,22 @@ RESULT_NOT_SUPPORTED = "not_supported"
 RESULT_SUCCESS = "success"
 
 
-class FritzboxConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
+class FritzboxConfigFlow(ConfigFlow, domain=DOMAIN):
     """Handle a AVM FRITZ!SmartHome config flow."""
 
     VERSION = 1
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize flow."""
-        self._entry = None
-        self._host = None
-        self._name = None
-        self._password = None
-        self._username = None
+        self._entry: ConfigEntry | None = None
+        self._host: str | None = None
+        self._name: str | None = None
+        self._password: str | None = None
+        self._username: str | None = None
 
-    def _get_entry(self):
+    def _get_entry(self, name: str) -> FlowResult:
         return self.async_create_entry(
-            title=self._name,
+            title=name,
             data={
                 CONF_HOST: self._host,
                 CONF_PASSWORD: self._password,
@@ -59,7 +64,8 @@ class FritzboxConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
             },
         )
 
-    async def _update_entry(self):
+    async def _update_entry(self) -> None:
+        assert self._entry is not None
         self.hass.config_entries.async_update_entry(
             self._entry,
             data={
@@ -70,7 +76,7 @@ class FritzboxConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
         )
         await self.hass.config_entries.async_reload(self._entry.entry_id)
 
-    def _try_connect(self):
+    def _try_connect(self) -> str:
         """Try to connect and check auth."""
         fritzbox = Fritzhome(
             host=self._host, user=self._username, password=self._password
@@ -87,7 +93,9 @@ class FritzboxConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
         except OSError:
             return RESULT_NO_DEVICES_FOUND
 
-    async def async_step_user(self, user_input=None):
+    async def async_step_user(
+        self, user_input: dict[str, Any] | None = None
+    ) -> FlowResult:
         """Handle a flow initialized by the user."""
         errors = {}
 
@@ -95,14 +103,14 @@ class FritzboxConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
             self._async_abort_entries_match({CONF_HOST: user_input[CONF_HOST]})
 
             self._host = user_input[CONF_HOST]
-            self._name = user_input[CONF_HOST]
+            self._name = str(user_input[CONF_HOST])
             self._password = user_input[CONF_PASSWORD]
             self._username = user_input[CONF_USERNAME]
 
             result = await self.hass.async_add_executor_job(self._try_connect)
 
             if result == RESULT_SUCCESS:
-                return self._get_entry()
+                return self._get_entry(self._name)
             if result != RESULT_INVALID_AUTH:
                 return self.async_abort(reason=result)
             errors["base"] = result
@@ -111,9 +119,10 @@ class FritzboxConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
             step_id="user", data_schema=DATA_SCHEMA_USER, errors=errors
         )
 
-    async def async_step_ssdp(self, discovery_info):
+    async def async_step_ssdp(self, discovery_info: DiscoveryInfoType) -> FlowResult:
         """Handle a flow initialized by discovery."""
         host = urlparse(discovery_info[ATTR_SSDP_LOCATION]).hostname
+        assert isinstance(host, str)
         self.context[CONF_HOST] = host
 
         uuid = discovery_info.get(ATTR_UPNP_UDN)
@@ -135,12 +144,14 @@ class FritzboxConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
                 return self.async_abort(reason="already_configured")
 
         self._host = host
-        self._name = discovery_info.get(ATTR_UPNP_FRIENDLY_NAME) or host
+        self._name = str(discovery_info.get(ATTR_UPNP_FRIENDLY_NAME) or host)
 
         self.context["title_placeholders"] = {"name": self._name}
         return await self.async_step_confirm()
 
-    async def async_step_confirm(self, user_input=None):
+    async def async_step_confirm(
+        self, user_input: dict[str, Any] | None = None
+    ) -> FlowResult:
         """Handle user-confirmation of discovered node."""
         errors = {}
 
@@ -150,7 +161,8 @@ class FritzboxConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
             result = await self.hass.async_add_executor_job(self._try_connect)
 
             if result == RESULT_SUCCESS:
-                return self._get_entry()
+                assert self._name is not None
+                return self._get_entry(self._name)
             if result != RESULT_INVALID_AUTH:
                 return self.async_abort(reason=result)
             errors["base"] = result
@@ -162,16 +174,20 @@ class FritzboxConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
             errors=errors,
         )
 
-    async def async_step_reauth(self, data):
+    async def async_step_reauth(self, data: dict[str, str]) -> FlowResult:
         """Trigger a reauthentication flow."""
-        self._entry = self.hass.config_entries.async_get_entry(self.context["entry_id"])
+        entry = self.hass.config_entries.async_get_entry(self.context["entry_id"])
+        assert entry is not None
+        self._entry = entry
         self._host = data[CONF_HOST]
-        self._name = data[CONF_HOST]
+        self._name = str(data[CONF_HOST])
         self._username = data[CONF_USERNAME]
 
         return await self.async_step_reauth_confirm()
 
-    async def async_step_reauth_confirm(self, user_input=None):
+    async def async_step_reauth_confirm(
+        self, user_input: dict[str, Any] | None = None
+    ) -> FlowResult:
         """Handle reauthorization flow."""
         errors = {}
 
diff --git a/homeassistant/components/fritzbox/const.py b/homeassistant/components/fritzbox/const.py
index edfc13d49fe..af2ec30312f 100644
--- a/homeassistant/components/fritzbox/const.py
+++ b/homeassistant/components/fritzbox/const.py
@@ -1,26 +1,29 @@
 """Constants for the AVM FRITZ!SmartHome integration."""
+from __future__ import annotations
+
 import logging
+from typing import Final
 
-ATTR_STATE_BATTERY_LOW = "battery_low"
-ATTR_STATE_DEVICE_LOCKED = "device_locked"
-ATTR_STATE_HOLIDAY_MODE = "holiday_mode"
-ATTR_STATE_LOCKED = "locked"
-ATTR_STATE_SUMMER_MODE = "summer_mode"
-ATTR_STATE_WINDOW_OPEN = "window_open"
+ATTR_STATE_BATTERY_LOW: Final = "battery_low"
+ATTR_STATE_DEVICE_LOCKED: Final = "device_locked"
+ATTR_STATE_HOLIDAY_MODE: Final = "holiday_mode"
+ATTR_STATE_LOCKED: Final = "locked"
+ATTR_STATE_SUMMER_MODE: Final = "summer_mode"
+ATTR_STATE_WINDOW_OPEN: Final = "window_open"
 
-ATTR_TEMPERATURE_UNIT = "temperature_unit"
+ATTR_TEMPERATURE_UNIT: Final = "temperature_unit"
 
-ATTR_TOTAL_CONSUMPTION = "total_consumption"
-ATTR_TOTAL_CONSUMPTION_UNIT = "total_consumption_unit"
+ATTR_TOTAL_CONSUMPTION: Final = "total_consumption"
+ATTR_TOTAL_CONSUMPTION_UNIT: Final = "total_consumption_unit"
 
-CONF_CONNECTIONS = "connections"
-CONF_COORDINATOR = "coordinator"
+CONF_CONNECTIONS: Final = "connections"
+CONF_COORDINATOR: Final = "coordinator"
 
-DEFAULT_HOST = "fritz.box"
-DEFAULT_USERNAME = "admin"
+DEFAULT_HOST: Final = "fritz.box"
+DEFAULT_USERNAME: Final = "admin"
 
-DOMAIN = "fritzbox"
+DOMAIN: Final = "fritzbox"
 
-LOGGER: logging.Logger = logging.getLogger(__package__)
+LOGGER: Final[logging.Logger] = logging.getLogger(__package__)
 
-PLATFORMS = ["binary_sensor", "climate", "switch", "sensor"]
+PLATFORMS: Final[list[str]] = ["binary_sensor", "climate", "switch", "sensor"]
diff --git a/homeassistant/components/fritzbox/model.py b/homeassistant/components/fritzbox/model.py
new file mode 100644
index 00000000000..1cde7b9ca70
--- /dev/null
+++ b/homeassistant/components/fritzbox/model.py
@@ -0,0 +1,43 @@
+"""Models for the AVM FRITZ!SmartHome integration."""
+from __future__ import annotations
+
+from typing import TypedDict
+
+
+class EntityInfo(TypedDict):
+    """TypedDict for EntityInfo."""
+
+    name: str
+    entity_id: str
+    unit_of_measurement: str | None
+    device_class: str | None
+
+
+class ClimateExtraAttributes(TypedDict, total=False):
+    """TypedDict for climates extra attributes."""
+
+    battery_low: bool
+    device_locked: bool
+    locked: bool
+    battery_level: int
+    holiday_mode: bool
+    summer_mode: bool
+    window_open: bool
+
+
+class SensorExtraAttributes(TypedDict):
+    """TypedDict for sensors extra attributes."""
+
+    device_locked: bool
+    locked: bool
+
+
+class SwitchExtraAttributes(TypedDict, total=False):
+    """TypedDict for sensors extra attributes."""
+
+    device_locked: bool
+    locked: bool
+    total_consumption: str
+    total_consumption_unit: str
+    temperature: str
+    temperature_unit: str
diff --git a/homeassistant/components/fritzbox/sensor.py b/homeassistant/components/fritzbox/sensor.py
index 836b4fb407c..ceae0bb757f 100644
--- a/homeassistant/components/fritzbox/sensor.py
+++ b/homeassistant/components/fritzbox/sensor.py
@@ -1,4 +1,6 @@
 """Support for AVM FRITZ!SmartHome temperature sensor only devices."""
+from __future__ import annotations
+
 from homeassistant.components.sensor import SensorEntity
 from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import (
@@ -20,13 +22,14 @@ from .const import (
     CONF_COORDINATOR,
     DOMAIN as FRITZBOX_DOMAIN,
 )
+from .model import SensorExtraAttributes
 
 
 async def async_setup_entry(
     hass: HomeAssistant, entry: ConfigEntry, async_add_entities: AddEntitiesCallback
 ) -> None:
     """Set up the FRITZ!SmartHome sensor from ConfigEntry."""
-    entities = []
+    entities: list[FritzBoxEntity] = []
     coordinator = hass.data[FRITZBOX_DOMAIN][entry.entry_id][CONF_COORDINATOR]
 
     for ain, device in coordinator.data.items():
@@ -69,23 +72,23 @@ class FritzBoxBatterySensor(FritzBoxEntity, SensorEntity):
     """The entity class for FRITZ!SmartHome sensors."""
 
     @property
-    def state(self):
+    def state(self) -> int | None:
         """Return the state of the sensor."""
-        return self.device.battery_level
+        return self.device.battery_level  # type: ignore [no-any-return]
 
 
 class FritzBoxTempSensor(FritzBoxEntity, SensorEntity):
     """The entity class for FRITZ!SmartHome temperature sensors."""
 
     @property
-    def state(self):
+    def state(self) -> float | None:
         """Return the state of the sensor."""
-        return self.device.temperature
+        return self.device.temperature  # type: ignore [no-any-return]
 
     @property
-    def extra_state_attributes(self):
+    def extra_state_attributes(self) -> SensorExtraAttributes:
         """Return the state attributes of the device."""
-        attrs = {
+        attrs: SensorExtraAttributes = {
             ATTR_STATE_DEVICE_LOCKED: self.device.device_lock,
             ATTR_STATE_LOCKED: self.device.lock,
         }
diff --git a/homeassistant/components/fritzbox/switch.py b/homeassistant/components/fritzbox/switch.py
index 39d8c4e8ec2..82581473714 100644
--- a/homeassistant/components/fritzbox/switch.py
+++ b/homeassistant/components/fritzbox/switch.py
@@ -1,4 +1,8 @@
 """Support for AVM FRITZ!SmartHome switch devices."""
+from __future__ import annotations
+
+from typing import Any
+
 from homeassistant.components.switch import SwitchEntity
 from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import (
@@ -23,6 +27,7 @@ from .const import (
     CONF_COORDINATOR,
     DOMAIN as FRITZBOX_DOMAIN,
 )
+from .model import SwitchExtraAttributes
 
 ATTR_TOTAL_CONSUMPTION_UNIT_VALUE = ENERGY_KILO_WATT_HOUR
 
@@ -31,7 +36,7 @@ async def async_setup_entry(
     hass: HomeAssistant, entry: ConfigEntry, async_add_entities: AddEntitiesCallback
 ) -> None:
     """Set up the FRITZ!SmartHome switch from ConfigEntry."""
-    entities = []
+    entities: list[FritzboxSwitch] = []
     coordinator = hass.data[FRITZBOX_DOMAIN][entry.entry_id][CONF_COORDINATOR]
 
     for ain, device in coordinator.data.items():
@@ -58,31 +63,32 @@ class FritzboxSwitch(FritzBoxEntity, SwitchEntity):
     """The switch class for FRITZ!SmartHome switches."""
 
     @property
-    def available(self):
+    def available(self) -> bool:
         """Return if switch is available."""
-        return self.device.present
+        return self.device.present  # type: ignore [no-any-return]
 
     @property
-    def is_on(self):
+    def is_on(self) -> bool:
         """Return true if the switch is on."""
-        return self.device.switch_state
+        return self.device.switch_state  # type: ignore [no-any-return]
 
-    async def async_turn_on(self, **kwargs):
+    async def async_turn_on(self, **kwargs: Any) -> None:
         """Turn the switch on."""
         await self.hass.async_add_executor_job(self.device.set_switch_state_on)
         await self.coordinator.async_refresh()
 
-    async def async_turn_off(self, **kwargs):
+    async def async_turn_off(self, **kwargs: Any) -> None:
         """Turn the switch off."""
         await self.hass.async_add_executor_job(self.device.set_switch_state_off)
         await self.coordinator.async_refresh()
 
     @property
-    def extra_state_attributes(self):
+    def extra_state_attributes(self) -> SwitchExtraAttributes:
         """Return the state attributes of the device."""
-        attrs = {}
-        attrs[ATTR_STATE_DEVICE_LOCKED] = self.device.device_lock
-        attrs[ATTR_STATE_LOCKED] = self.device.lock
+        attrs: SwitchExtraAttributes = {
+            ATTR_STATE_DEVICE_LOCKED: self.device.device_lock,
+            ATTR_STATE_LOCKED: self.device.lock,
+        }
 
         if self.device.has_powermeter:
             attrs[
@@ -99,6 +105,6 @@ class FritzboxSwitch(FritzBoxEntity, SwitchEntity):
         return attrs
 
     @property
-    def current_power_w(self):
+    def current_power_w(self) -> float:
         """Return the current power usage in W."""
-        return self.device.power / 1000
+        return self.device.power / 1000  # type: ignore [no-any-return]
diff --git a/homeassistant/const.py b/homeassistant/const.py
index 489652b3c12..8b965995754 100644
--- a/homeassistant/const.py
+++ b/homeassistant/const.py
@@ -294,7 +294,7 @@ ATTR_ID = "id"
 ATTR_NAME: Final = "name"
 
 # Contains one string or a list of strings, each being an entity id
-ATTR_ENTITY_ID = "entity_id"
+ATTR_ENTITY_ID: Final = "entity_id"
 
 # Contains one string or a list of strings, each being an area id
 ATTR_AREA_ID = "area_id"
@@ -314,7 +314,7 @@ ATTR_IDENTIFIERS: Final = "identifiers"
 ATTR_ICON = "icon"
 
 # The unit of measurement if applicable
-ATTR_UNIT_OF_MEASUREMENT = "unit_of_measurement"
+ATTR_UNIT_OF_MEASUREMENT: Final = "unit_of_measurement"
 
 CONF_UNIT_SYSTEM_METRIC: str = "metric"
 CONF_UNIT_SYSTEM_IMPERIAL: str = "imperial"
@@ -332,7 +332,7 @@ ATTR_MODEL: Final = "model"
 ATTR_SW_VERSION: Final = "sw_version"
 
 ATTR_BATTERY_CHARGING = "battery_charging"
-ATTR_BATTERY_LEVEL = "battery_level"
+ATTR_BATTERY_LEVEL: Final = "battery_level"
 ATTR_WAKEUP = "wake_up_interval"
 
 # For devices which support a code attribute
@@ -379,10 +379,10 @@ ATTR_RESTORED = "restored"
 ATTR_SUPPORTED_FEATURES = "supported_features"
 
 # Class of device within its domain
-ATTR_DEVICE_CLASS = "device_class"
+ATTR_DEVICE_CLASS: Final = "device_class"
 
 # Temperature attribute
-ATTR_TEMPERATURE = "temperature"
+ATTR_TEMPERATURE: Final = "temperature"
 
 # #### UNITS OF MEASUREMENT ####
 # Power units
diff --git a/mypy.ini b/mypy.ini
index 8bc55b0d82e..3fc323dab44 100644
--- a/mypy.ini
+++ b/mypy.ini
@@ -154,6 +154,17 @@ no_implicit_optional = true
 warn_return_any = true
 warn_unreachable = true
 
+[mypy-homeassistant.components.fritzbox.*]
+check_untyped_defs = true
+disallow_incomplete_defs = true
+disallow_subclassing_any = true
+disallow_untyped_calls = true
+disallow_untyped_decorators = true
+disallow_untyped_defs = true
+no_implicit_optional = true
+warn_return_any = true
+warn_unreachable = true
+
 [mypy-homeassistant.components.frontend.*]
 check_untyped_defs = true
 disallow_incomplete_defs = true
@@ -781,9 +792,6 @@ ignore_errors = true
 [mypy-homeassistant.components.freebox.*]
 ignore_errors = true
 
-[mypy-homeassistant.components.fritzbox.*]
-ignore_errors = true
-
 [mypy-homeassistant.components.garmin_connect.*]
 ignore_errors = true
 
diff --git a/script/hassfest/mypy_config.py b/script/hassfest/mypy_config.py
index 72bb8879312..5e412517628 100644
--- a/script/hassfest/mypy_config.py
+++ b/script/hassfest/mypy_config.py
@@ -69,7 +69,6 @@ IGNORED_MODULES: Final[list[str]] = [
     "homeassistant.components.fortios.*",
     "homeassistant.components.foscam.*",
     "homeassistant.components.freebox.*",
-    "homeassistant.components.fritzbox.*",
     "homeassistant.components.garmin_connect.*",
     "homeassistant.components.geniushub.*",
     "homeassistant.components.glances.*",