diff --git a/core/res/res/values/strings.xml b/core/res/res/values/strings.xml
index 4018fd1eb4daf..c14badbb456b3 100644
--- a/core/res/res/values/strings.xml
+++ b/core/res/res/values/strings.xml
@@ -1196,9 +1196,11 @@
     <!-- On the unlock pattern screen, shown when the user enters the wrong lock pattern and must try again. -->
     <string name="lockscreen_pattern_wrong">Sorry, try again</string>
 
-    <!-- When the lock screen is showing and the phone plugged in, show the current
-         charge %.  -->
+    <!-- When the lock screen is showing and the phone plugged in, and the battery
+         is not fully sharted, show the current charge %.  -->
     <string name="lockscreen_plugged_in">Charging (<xliff:g id="number">%d</xliff:g><xliff:g id="percent">%%</xliff:g>)</string>
+    <!-- When the lock screen is showing, the phone is plugged in and the battery is fully
+         charged, say that it is charged. -->
     <string name="lockscreen_charged">Charged</string>
 
     <!-- When the lock screen is showing and the battery is low, warn user to plug