diff --git a/homeassistant/components/keba/sensor.py b/homeassistant/components/keba/sensor.py
index a1e0387c707..fc761074bc7 100644
--- a/homeassistant/components/keba/sensor.py
+++ b/homeassistant/components/keba/sensor.py
@@ -16,7 +16,7 @@ from homeassistant.const import (
     POWER_KILO_WATT,
 )
 
-from . import DOMAIN
+from . import DOMAIN, KebaHandler
 
 
 async def async_setup_platform(hass, config, async_add_entities, discovery_info=None):
@@ -90,14 +90,13 @@ class KebaSensor(SensorEntity):
 
     def __init__(
         self,
-        keba,
-        entity_type,
+        keba: KebaHandler,
+        entity_type: str,
         description: SensorEntityDescription,
-    ):
+    ) -> None:
         """Initialize the KEBA Sensor."""
         self._keba = keba
         self.entity_description = description
-        self._entity_type = entity_type
 
         self._attr_name = f"{keba.device_name} {description.name}"
         self._attr_unique_id = f"{keba.device_id}_{entity_type}"