diff --git a/daemon/powerdevilcore.cpp b/daemon/powerdevilcore.cpp
--- a/daemon/powerdevilcore.cpp
+++ b/daemon/powerdevilcore.cpp
@@ -666,6 +666,8 @@
         }
     } else if (state == BackendInterface::Unplugged) {
         emitRichNotification(QStringLiteral("unplugged"), i18n("Running on Battery Power"), i18n("The power adapter has been unplugged."));
+        // Make sure to notify of low battery right away when unplugging AC
+        emitBatteryChargePercentNotification(currentChargePercent(), 1000 /* so current is always lower than previous */);
     }
 }