diff --git a/homeassistant/components/flipr/binary_sensor.py b/homeassistant/components/flipr/binary_sensor.py
index 64ccaf7553f..646e260bd60 100644
--- a/homeassistant/components/flipr/binary_sensor.py
+++ b/homeassistant/components/flipr/binary_sensor.py
@@ -45,7 +45,7 @@ class FliprBinarySensor(FliprEntity, BinarySensorEntity):
     """Representation of Flipr binary sensors."""
 
     @property
-    def is_on(self):
+    def is_on(self) -> bool:
         """Return true if the binary sensor is on in case of a Problem is detected."""
         return (
             self.coordinator.data[self.entity_description.key] == "TooLow"
diff --git a/homeassistant/components/flipr/config_flow.py b/homeassistant/components/flipr/config_flow.py
index b1e4f31d044..5c8cc6f76fb 100644
--- a/homeassistant/components/flipr/config_flow.py
+++ b/homeassistant/components/flipr/config_flow.py
@@ -9,6 +9,7 @@ import voluptuous as vol
 
 from homeassistant import config_entries
 from homeassistant.const import CONF_EMAIL, CONF_PASSWORD
+from homeassistant.data_entry_flow import FlowResult
 
 from .const import CONF_FLIPR_ID, DOMAIN
 
@@ -20,12 +21,14 @@ class ConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
-    _username: str | None = None
-    _password: str | None = None
-    _flipr_id: str | None = None
-    _possible_flipr_ids: list[str] | None = None
+    _username: str
+    _password: str
+    _flipr_id: str = ""
+    _possible_flipr_ids: list[str]
 
-    async def async_step_user(self, user_input=None):
+    async def async_step_user(
+        self, user_input: dict[str, str] | None = None
+    ) -> FlowResult:
         """Handle the initial step."""
         if user_input is None:
             return self._show_setup_form()
@@ -92,7 +95,9 @@ class ConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
 
         return flipr_ids
 
-    async def async_step_flipr_id(self, user_input=None):
+    async def async_step_flipr_id(
+        self, user_input: dict[str, str] | None = None
+    ) -> FlowResult:
         """Handle the initial step."""
         if not user_input:
             # Creation of a select with the proposal of flipr ids values found by API.
diff --git a/homeassistant/components/flipr/manifest.json b/homeassistant/components/flipr/manifest.json
index 35fbe8259a2..f88ea64dc3a 100644
--- a/homeassistant/components/flipr/manifest.json
+++ b/homeassistant/components/flipr/manifest.json
@@ -3,7 +3,7 @@
   "name": "Flipr",
   "config_flow": true,
   "documentation": "https://www.home-assistant.io/integrations/flipr",
-  "requirements": ["flipr-api==1.4.2"],
+  "requirements": ["flipr-api==1.4.4"],
   "codeowners": ["@cnico"],
   "iot_class": "cloud_polling",
   "loggers": ["flipr_api"]
diff --git a/homeassistant/components/flipr/sensor.py b/homeassistant/components/flipr/sensor.py
index 9cf788d7170..99b44cc95a0 100644
--- a/homeassistant/components/flipr/sensor.py
+++ b/homeassistant/components/flipr/sensor.py
@@ -8,7 +8,7 @@ from homeassistant.components.sensor import (
     SensorStateClass,
 )
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import ELECTRIC_POTENTIAL_MILLIVOLT, TEMP_CELSIUS
+from homeassistant.const import ELECTRIC_POTENTIAL_MILLIVOLT, PERCENTAGE, TEMP_CELSIUS
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 
@@ -48,6 +48,13 @@ SENSOR_TYPES: tuple[SensorEntityDescription, ...] = (
         icon="mdi:pool",
         state_class=SensorStateClass.MEASUREMENT,
     ),
+    SensorEntityDescription(
+        key="battery",
+        name="Battery Level",
+        native_unit_of_measurement=PERCENTAGE,
+        state_class=SensorStateClass.MEASUREMENT,
+        device_class=SensorDeviceClass.BATTERY,
+    ),
 )
 
 
@@ -67,6 +74,6 @@ class FliprSensor(FliprEntity, SensorEntity):
     """Sensor representing FliprSensor data."""
 
     @property
-    def native_value(self):
+    def native_value(self) -> str:
         """State of the sensor."""
         return self.coordinator.data[self.entity_description.key]
diff --git a/requirements_all.txt b/requirements_all.txt
index 9252d244a53..2b0c55828a9 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -705,7 +705,7 @@ fixerio==1.0.0a0
 fjaraskupan==2.2.0
 
 # homeassistant.components.flipr
-flipr-api==1.4.2
+flipr-api==1.4.4
 
 # homeassistant.components.flux_led
 flux_led==0.28.32
diff --git a/requirements_test_all.txt b/requirements_test_all.txt
index 3a8681f3d9a..99f7cdfd899 100644
--- a/requirements_test_all.txt
+++ b/requirements_test_all.txt
@@ -527,7 +527,7 @@ fivem-api==0.1.2
 fjaraskupan==2.2.0
 
 # homeassistant.components.flipr
-flipr-api==1.4.2
+flipr-api==1.4.4
 
 # homeassistant.components.flux_led
 flux_led==0.28.32
diff --git a/tests/components/flipr/test_sensor.py b/tests/components/flipr/test_sensor.py
index 1b8a1928b1f..51fbf2941f8 100644
--- a/tests/components/flipr/test_sensor.py
+++ b/tests/components/flipr/test_sensor.py
@@ -11,6 +11,7 @@ from homeassistant.const import (
     ATTR_UNIT_OF_MEASUREMENT,
     CONF_EMAIL,
     CONF_PASSWORD,
+    PERCENTAGE,
     TEMP_CELSIUS,
 )
 from homeassistant.core import HomeAssistant
@@ -29,6 +30,7 @@ MOCK_FLIPR_MEASURE = {
     "date_time": MOCK_DATE_TIME,
     "ph_status": "TooLow",
     "chlorine_status": "Medium",
+    "battery": 95.0,
 }
 
 
@@ -94,6 +96,13 @@ async def test_sensors(hass: HomeAssistant) -> None:
     assert state.attributes.get(ATTR_STATE_CLASS) is SensorStateClass.MEASUREMENT
     assert state.state == "0.23654886"
 
+    state = hass.states.get("sensor.flipr_myfliprid_battery_level")
+    assert state
+    assert state.attributes.get(ATTR_ICON) is None
+    assert state.attributes.get(ATTR_UNIT_OF_MEASUREMENT) == PERCENTAGE
+    assert state.attributes.get(ATTR_STATE_CLASS) is SensorStateClass.MEASUREMENT
+    assert state.state == "95.0"
+
 
 async def test_error_flipr_api_sensors(hass: HomeAssistant) -> None:
     """Test the Flipr sensors error."""