diff --git a/ignis/services/upower/device.py b/ignis/services/upower/device.py
index 38164654..c0a7790b 100644
--- a/ignis/services/upower/device.py
+++ b/ignis/services/upower/device.py
@@ -40,6 +40,8 @@ def __init__(self, object_path: str):
         self.__watch_property("TimeToFull", "time-remaining")
         self.__watch_property("TimeToEmpty", "time-remaining")
 
+        self.__watch_property("Online", "online")
+
     def __watch_property(self, dbus_property: str, *prop_names: str) -> None:
         self.__watching_props[dbus_property] = prop_names
 
@@ -92,6 +94,13 @@ def available(self) -> bool:
         """
         return self._proxy.IsPresent
 
+    @IgnisProperty
+    def online(self) -> bool:
+        """
+        Whether the device is online.
+        """
+        return self._proxy.Online
+
     @IgnisProperty
     def percent(self) -> float:
         """