diff --git a/packages/SystemUI/res/values/strings.xml b/packages/SystemUI/res/values/strings.xml
index f1bbb0d..5b1a5b3 100644
--- a/packages/SystemUI/res/values/strings.xml
+++ b/packages/SystemUI/res/values/strings.xml
@@ -1025,6 +1025,12 @@
     <!-- Name of special SystemUI debug settings -->
     <string name="system_ui_tuner">System UI tuner</string>
 
+    <!-- Preference to show/hide embedded battery percentage [CHAR LIMIT=50] -->
+    <string name="show_battery_percentage">Show embedded battery percentage</string>
+
+    <!-- Summary for battery percentage preference [CHAR LIMIT=NONE] -->
+    <string name="show_battery_percentage_summary">Show battery level percentage inside the status bar icon when not charging</string>
+
     <!-- Name of quick settings -->
     <string name="quick_settings">Quick Settings</string>
 
diff --git a/packages/SystemUI/res/xml/tuner_prefs.xml b/packages/SystemUI/res/xml/tuner_prefs.xml
index deb3f4f..135cc82 100644
--- a/packages/SystemUI/res/xml/tuner_prefs.xml
+++ b/packages/SystemUI/res/xml/tuner_prefs.xml
@@ -17,10 +17,14 @@
 <PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
         android:title="@string/system_ui_tuner">
 
-        <!-- Tuner prefs go here -->
-
         <Preference
             android:key="qs_tuner"
             android:title="@string/quick_settings" />
 
+        <SwitchPreference
+            android:key="battery_pct"
+            android:title="@string/show_battery_percentage"
+            android:summary="@string/show_battery_percentage_summary"
+            android:persistent="false" />
+
 </PreferenceScreen>
diff --git a/packages/SystemUI/src/com/android/systemui/BatteryMeterView.java b/packages/SystemUI/src/com/android/systemui/BatteryMeterView.java
index 0d331d1..95b58e5 100755
--- a/packages/SystemUI/src/com/android/systemui/BatteryMeterView.java
+++ b/packages/SystemUI/src/com/android/systemui/BatteryMeterView.java
@@ -23,16 +23,17 @@
 import android.content.IntentFilter;
 import android.content.res.Resources;
 import android.content.res.TypedArray;
+import android.database.ContentObserver;
 import android.graphics.Canvas;
 import android.graphics.Color;
 import android.graphics.Paint;
 import android.graphics.Path;
-import android.graphics.PorterDuff;
-import android.graphics.PorterDuffColorFilter;
 import android.graphics.RectF;
 import android.graphics.Typeface;
+import android.net.Uri;
 import android.os.BatteryManager;
 import android.os.Bundle;
+import android.os.Handler;
 import android.provider.Settings;
 import android.util.AttributeSet;
 import android.view.View;
@@ -43,10 +44,9 @@
         BatteryController.BatteryStateChangeCallback {
     public static final String TAG = BatteryMeterView.class.getSimpleName();
     public static final String ACTION_LEVEL_TEST = "com.android.systemui.BATTERY_LEVEL_TEST";
+    public static final String SHOW_PERCENT_SETTING = "status_bar_show_battery_percent";
 
-    private static final boolean ENABLE_PERCENT = true;
     private static final boolean SINGLE_DIGIT_PERCENT = false;
-    private static final boolean SHOW_100_PERCENT = false;
 
     private static final int FULL = 96;
 
@@ -54,7 +54,7 @@
 
     private final int[] mColors;
 
-    boolean mShowPercent = true;
+    private boolean mShowPercent;
     private float mButtonHeightFraction;
     private float mSubpixelSmoothingLeft;
     private float mSubpixelSmoothingRight;
@@ -87,103 +87,8 @@
     private int mLightModeBackgroundColor;
     private int mLightModeFillColor;
 
-    private class BatteryTracker extends BroadcastReceiver {
-        public static final int UNKNOWN_LEVEL = -1;
-
-        // current battery status
-        int level = UNKNOWN_LEVEL;
-        String percentStr;
-        int plugType;
-        boolean plugged;
-        int health;
-        int status;
-        String technology;
-        int voltage;
-        int temperature;
-        boolean testmode = false;
-
-        @Override
-        public void onReceive(Context context, Intent intent) {
-            final String action = intent.getAction();
-            if (action.equals(Intent.ACTION_BATTERY_CHANGED)) {
-                if (testmode && ! intent.getBooleanExtra("testmode", false)) return;
-
-                level = (int)(100f
-                        * intent.getIntExtra(BatteryManager.EXTRA_LEVEL, 0)
-                        / intent.getIntExtra(BatteryManager.EXTRA_SCALE, 100));
-
-                plugType = intent.getIntExtra(BatteryManager.EXTRA_PLUGGED, 0);
-                plugged = plugType != 0;
-                health = intent.getIntExtra(BatteryManager.EXTRA_HEALTH,
-                        BatteryManager.BATTERY_HEALTH_UNKNOWN);
-                status = intent.getIntExtra(BatteryManager.EXTRA_STATUS,
-                        BatteryManager.BATTERY_STATUS_UNKNOWN);
-                technology = intent.getStringExtra(BatteryManager.EXTRA_TECHNOLOGY);
-                voltage = intent.getIntExtra(BatteryManager.EXTRA_VOLTAGE, 0);
-                temperature = intent.getIntExtra(BatteryManager.EXTRA_TEMPERATURE, 0);
-
-                setContentDescription(
-                        context.getString(R.string.accessibility_battery_level, level));
-                postInvalidate();
-            } else if (action.equals(ACTION_LEVEL_TEST)) {
-                testmode = true;
-                post(new Runnable() {
-                    int curLevel = 0;
-                    int incr = 1;
-                    int saveLevel = level;
-                    int savePlugged = plugType;
-                    Intent dummy = new Intent(Intent.ACTION_BATTERY_CHANGED);
-                    @Override
-                    public void run() {
-                        if (curLevel < 0) {
-                            testmode = false;
-                            dummy.putExtra("level", saveLevel);
-                            dummy.putExtra("plugged", savePlugged);
-                            dummy.putExtra("testmode", false);
-                        } else {
-                            dummy.putExtra("level", curLevel);
-                            dummy.putExtra("plugged", incr > 0 ? BatteryManager.BATTERY_PLUGGED_AC : 0);
-                            dummy.putExtra("testmode", true);
-                        }
-                        getContext().sendBroadcast(dummy);
-
-                        if (!testmode) return;
-
-                        curLevel += incr;
-                        if (curLevel == 100) {
-                            incr *= -1;
-                        }
-                        postDelayed(this, 200);
-                    }
-                });
-            }
-        }
-    }
-
-    BatteryTracker mTracker = new BatteryTracker();
-
-    @Override
-    public void onAttachedToWindow() {
-        super.onAttachedToWindow();
-
-        IntentFilter filter = new IntentFilter();
-        filter.addAction(Intent.ACTION_BATTERY_CHANGED);
-        filter.addAction(ACTION_LEVEL_TEST);
-        final Intent sticky = getContext().registerReceiver(mTracker, filter);
-        if (sticky != null) {
-            // preload the battery level
-            mTracker.onReceive(getContext(), sticky);
-        }
-        mBatteryController.addStateChangedCallback(this);
-    }
-
-    @Override
-    public void onDetachedFromWindow() {
-        super.onDetachedFromWindow();
-
-        getContext().unregisterReceiver(mTracker);
-        mBatteryController.removeStateChangedCallback(this);
-    }
+    private BatteryTracker mTracker = new BatteryTracker();
+    private final SettingObserver mSettingObserver = new SettingObserver();
 
     public BatteryMeterView(Context context) {
         this(context, null, 0);
@@ -213,8 +118,7 @@
         levels.recycle();
         colors.recycle();
         atts.recycle();
-        mShowPercent = ENABLE_PERCENT && 0 != Settings.System.getInt(
-                context.getContentResolver(), "status_bar_show_battery_percent", 0);
+        updateShowPercent();
         mWarningString = context.getString(R.string.battery_meter_very_low_overlay_symbol);
         mCriticalLevel = mContext.getResources().getInteger(
                 com.android.internal.R.integer.config_criticalBatteryWarningLevel);
@@ -261,6 +165,32 @@
         mLightModeFillColor = context.getColor(R.color.light_mode_icon_color_dual_tone_fill);
     }
 
+    @Override
+    public void onAttachedToWindow() {
+        super.onAttachedToWindow();
+
+        IntentFilter filter = new IntentFilter();
+        filter.addAction(Intent.ACTION_BATTERY_CHANGED);
+        filter.addAction(ACTION_LEVEL_TEST);
+        final Intent sticky = getContext().registerReceiver(mTracker, filter);
+        if (sticky != null) {
+            // preload the battery level
+            mTracker.onReceive(getContext(), sticky);
+        }
+        mBatteryController.addStateChangedCallback(this);
+        getContext().getContentResolver().registerContentObserver(
+                Settings.System.getUriFor(SHOW_PERCENT_SETTING), false, mSettingObserver);
+    }
+
+    @Override
+    public void onDetachedFromWindow() {
+        super.onDetachedFromWindow();
+
+        getContext().unregisterReceiver(mTracker);
+        mBatteryController.removeStateChangedCallback(this);
+        getContext().getContentResolver().unregisterContentObserver(mSettingObserver);
+    }
+
     public void setBatteryController(BatteryController batteryController) {
         mBatteryController = batteryController;
         mPowerSaveEnabled = mBatteryController.isPowerSave();
@@ -300,6 +230,11 @@
         mWarningTextHeight = -mWarningTextPaint.getFontMetrics().ascent;
     }
 
+    private void updateShowPercent() {
+        mShowPercent = 0 != Settings.System.getInt(getContext().getContentResolver(),
+                SHOW_PERCENT_SETTING, 0);
+    }
+
     private int getColorForLevel(int percent) {
 
         // If we are in power save mode, always use the normal color.
@@ -447,8 +382,7 @@
         boolean pctOpaque = false;
         float pctX = 0, pctY = 0;
         String pctText = null;
-        if (!tracker.plugged && level > mCriticalLevel && mShowPercent
-                && !(tracker.level == 100 && !SHOW_100_PERCENT)) {
+        if (!tracker.plugged && level > mCriticalLevel && mShowPercent) {
             mTextPaint.setColor(getColorForLevel(level));
             mTextPaint.setTextSize(height *
                     (SINGLE_DIGIT_PERCENT ? 0.75f
@@ -518,4 +452,92 @@
            postInvalidate();
         }
     }
+
+    private final class BatteryTracker extends BroadcastReceiver {
+        public static final int UNKNOWN_LEVEL = -1;
+
+        // current battery status
+        int level = UNKNOWN_LEVEL;
+        String percentStr;
+        int plugType;
+        boolean plugged;
+        int health;
+        int status;
+        String technology;
+        int voltage;
+        int temperature;
+        boolean testmode = false;
+
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            final String action = intent.getAction();
+            if (action.equals(Intent.ACTION_BATTERY_CHANGED)) {
+                if (testmode && ! intent.getBooleanExtra("testmode", false)) return;
+
+                level = (int)(100f
+                        * intent.getIntExtra(BatteryManager.EXTRA_LEVEL, 0)
+                        / intent.getIntExtra(BatteryManager.EXTRA_SCALE, 100));
+
+                plugType = intent.getIntExtra(BatteryManager.EXTRA_PLUGGED, 0);
+                plugged = plugType != 0;
+                health = intent.getIntExtra(BatteryManager.EXTRA_HEALTH,
+                        BatteryManager.BATTERY_HEALTH_UNKNOWN);
+                status = intent.getIntExtra(BatteryManager.EXTRA_STATUS,
+                        BatteryManager.BATTERY_STATUS_UNKNOWN);
+                technology = intent.getStringExtra(BatteryManager.EXTRA_TECHNOLOGY);
+                voltage = intent.getIntExtra(BatteryManager.EXTRA_VOLTAGE, 0);
+                temperature = intent.getIntExtra(BatteryManager.EXTRA_TEMPERATURE, 0);
+
+                setContentDescription(
+                        context.getString(R.string.accessibility_battery_level, level));
+                postInvalidate();
+            } else if (action.equals(ACTION_LEVEL_TEST)) {
+                testmode = true;
+                post(new Runnable() {
+                    int curLevel = 0;
+                    int incr = 1;
+                    int saveLevel = level;
+                    int savePlugged = plugType;
+                    Intent dummy = new Intent(Intent.ACTION_BATTERY_CHANGED);
+                    @Override
+                    public void run() {
+                        if (curLevel < 0) {
+                            testmode = false;
+                            dummy.putExtra("level", saveLevel);
+                            dummy.putExtra("plugged", savePlugged);
+                            dummy.putExtra("testmode", false);
+                        } else {
+                            dummy.putExtra("level", curLevel);
+                            dummy.putExtra("plugged", incr > 0 ? BatteryManager.BATTERY_PLUGGED_AC
+                                    : 0);
+                            dummy.putExtra("testmode", true);
+                        }
+                        getContext().sendBroadcast(dummy);
+
+                        if (!testmode) return;
+
+                        curLevel += incr;
+                        if (curLevel == 100) {
+                            incr *= -1;
+                        }
+                        postDelayed(this, 200);
+                    }
+                });
+            }
+        }
+    }
+
+    private final class SettingObserver extends ContentObserver {
+        public SettingObserver() {
+            super(new Handler());
+        }
+
+        @Override
+        public void onChange(boolean selfChange, Uri uri) {
+            super.onChange(selfChange, uri);
+            updateShowPercent();
+            postInvalidate();
+        }
+    }
+
 }
diff --git a/packages/SystemUI/src/com/android/systemui/tuner/TunerFragment.java b/packages/SystemUI/src/com/android/systemui/tuner/TunerFragment.java
index 457bade..b40adaf 100644
--- a/packages/SystemUI/src/com/android/systemui/tuner/TunerFragment.java
+++ b/packages/SystemUI/src/com/android/systemui/tuner/TunerFragment.java
@@ -15,11 +15,19 @@
  */
 package com.android.systemui.tuner;
 
+import static com.android.systemui.BatteryMeterView.SHOW_PERCENT_SETTING;
+
 import android.app.FragmentTransaction;
+import android.database.ContentObserver;
+import android.net.Uri;
 import android.os.Bundle;
+import android.os.Handler;
 import android.preference.Preference;
+import android.preference.Preference.OnPreferenceChangeListener;
 import android.preference.Preference.OnPreferenceClickListener;
 import android.preference.PreferenceFragment;
+import android.preference.SwitchPreference;
+import android.provider.Settings.System;
 import android.view.MenuItem;
 
 import com.android.systemui.R;
@@ -27,6 +35,11 @@
 public class TunerFragment extends PreferenceFragment {
 
     private static final String KEY_QS_TUNER = "qs_tuner";
+    private static final String KEY_BATTERY_PCT = "battery_pct";
+
+    private final SettingObserver mSettingObserver = new SettingObserver();
+
+    private SwitchPreference mBatteryPct;
 
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -45,6 +58,21 @@
                 return false;
             }
         });
+        mBatteryPct = (SwitchPreference) findPreference(KEY_BATTERY_PCT);
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        updateBatteryPct();
+        getContext().getContentResolver().registerContentObserver(
+                System.getUriFor(SHOW_PERCENT_SETTING), false, mSettingObserver);
+    }
+
+    @Override
+    public void onPause() {
+        super.onPause();
+        getContext().getContentResolver().unregisterContentObserver(mSettingObserver);
     }
 
     @Override
@@ -57,4 +85,31 @@
         return super.onOptionsItemSelected(item);
     }
 
+    private void updateBatteryPct() {
+        mBatteryPct.setOnPreferenceChangeListener(null);
+        mBatteryPct.setChecked(System.getInt(getContext().getContentResolver(),
+                SHOW_PERCENT_SETTING, 0) != 0);
+        mBatteryPct.setOnPreferenceChangeListener(mBatteryPctChange);
+    }
+
+    private final class SettingObserver extends ContentObserver {
+        public SettingObserver() {
+            super(new Handler());
+        }
+
+        @Override
+        public void onChange(boolean selfChange, Uri uri, int userId) {
+            super.onChange(selfChange, uri, userId);
+            updateBatteryPct();
+        }
+    }
+
+    private final OnPreferenceChangeListener mBatteryPctChange = new OnPreferenceChangeListener() {
+        @Override
+        public boolean onPreferenceChange(Preference preference, Object newValue) {
+            final boolean v = (Boolean) newValue;
+            System.putInt(getContext().getContentResolver(), SHOW_PERCENT_SETTING, v ? 1 : 0);
+            return true;
+        }
+    };
 }