diff --git a/homeassistant/components/smartthings/cover.py b/homeassistant/components/smartthings/cover.py
index 0b0817d7c56..84bf0412ab4 100644
--- a/homeassistant/components/smartthings/cover.py
+++ b/homeassistant/components/smartthings/cover.py
@@ -130,6 +130,7 @@ class SmartThingsCover(SmartThingsEntity, CoverEntity):
                 Capability.WINDOW_SHADE_LEVEL, Attribute.SHADE_LEVEL
             )
 
+        # Deprecated, remove in 2025.10
         self._attr_extra_state_attributes = {}
         if self.supports_capability(Capability.BATTERY):
             self._attr_extra_state_attributes[ATTR_BATTERY_LEVEL] = (