diff --git a/src/com/android/settings/fuelgauge/PowerUsageSummary.java b/src/com/android/settings/fuelgauge/PowerUsageSummary.java
index 0b21fc994b4..da482bdaa6c 100644
--- a/src/com/android/settings/fuelgauge/PowerUsageSummary.java
+++ b/src/com/android/settings/fuelgauge/PowerUsageSummary.java
@@ -79,6 +79,7 @@ public class PowerUsageSummary extends PowerUsageBase {
     private static final boolean USE_FAKE_DATA = false;
     private static final String KEY_APP_LIST = "app_list";
     private static final String KEY_BATTERY_HEADER = "battery_header";
+    private static final String KEY_SHOW_ALL_APPS = "show_all_apps";
     private static final int MAX_ITEMS_TO_LIST = USE_FAKE_DATA ? 30 : 10;
     private static final int MIN_AVERAGE_POWER_THRESHOLD_MILLI_AMP = 10;
 
@@ -131,6 +132,7 @@ public class PowerUsageSummary extends PowerUsageBase {
 
         mBatteryUtils = BatteryUtils.getInstance(getContext());
 
+        restoreSavedInstance(icicle);
         initFeatureProvider();
     }
 
@@ -154,6 +156,12 @@ public class PowerUsageSummary extends PowerUsageBase {
         }
     }
 
+    @Override
+    public void onSaveInstanceState(Bundle outState) {
+        super.onSaveInstanceState(outState);
+        outState.putBoolean(KEY_SHOW_ALL_APPS, mShowAllApps);
+    }
+
     @Override
     public boolean onPreferenceTreeClick(Preference preference) {
         if (KEY_BATTERY_HEADER.equals(preference.getKey())) {
@@ -262,6 +270,13 @@ public class PowerUsageSummary extends PowerUsageBase {
         }
     }
 
+    @VisibleForTesting
+    void restoreSavedInstance(Bundle savedInstance) {
+        if (savedInstance != null) {
+            mShowAllApps = savedInstance.getBoolean(KEY_SHOW_ALL_APPS, false);
+        }
+    }
+
     private void addNotAvailableMessage() {
         final String NOT_AVAILABLE = "not_available";
         Preference notAvailable = getCachedPreference(NOT_AVAILABLE);
diff --git a/tests/robotests/src/com/android/settings/fuelgauge/PowerUsageSummaryTest.java b/tests/robotests/src/com/android/settings/fuelgauge/PowerUsageSummaryTest.java
index ea6c7e67b01..7488e5702f2 100644
--- a/tests/robotests/src/com/android/settings/fuelgauge/PowerUsageSummaryTest.java
+++ b/tests/robotests/src/com/android/settings/fuelgauge/PowerUsageSummaryTest.java
@@ -15,10 +15,12 @@
  */
 package com.android.settings.fuelgauge;
 
+import android.app.Activity;
 import android.content.Context;
 import android.content.Intent;
+import android.os.Bundle;
 import android.os.PowerManager;
-import android.os.Process;
+import android.support.v7.preference.PreferenceScreen;
 import android.text.TextUtils;
 import android.text.format.DateUtils;
 import android.view.Menu;
@@ -41,13 +43,11 @@ import com.android.settings.testutils.FakeFeatureFactory;
 import com.android.settings.testutils.shadow.SettingsShadowResources;
 import com.android.settings.testutils.shadow.ShadowDynamicIndexableContentMonitor;
 import com.android.settings.testutils.XmlTestUtils;
-import com.android.settingslib.BatteryInfo;
 
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.mockito.Answers;
-import org.mockito.Matchers;
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
 import org.robolectric.RuntimeEnvironment;
@@ -65,7 +65,6 @@ import static com.google.common.truth.Truth.assertThat;
 import static org.mockito.Matchers.anyInt;
 import static org.mockito.Matchers.any;
 import static org.mockito.Matchers.anyLong;
-import static org.mockito.Matchers.anyString;
 import static org.mockito.Matchers.eq;
 import static org.mockito.Mockito.doNothing;
 import static org.mockito.Mockito.doReturn;
@@ -135,6 +134,8 @@ public class PowerUsageSummaryTest {
     private PowerManager mPowerManager;
     @Mock
     private SettingsActivity mSettingsActivity;
+    @Mock
+    private PreferenceScreen mPreferenceScreen;
 
     private List<BatterySipper> mUsageList;
     private Context mRealContext;
@@ -420,6 +421,18 @@ public class PowerUsageSummaryTest {
         assertThat(preferenceScreenKeys).containsAllIn(preferenceKeys);
     }
 
+    @Test
+    public void testSaveInstanceState_showAllAppsRestored() {
+        Bundle bundle = new Bundle();
+        mFragment.mShowAllApps = true;
+        doReturn(mPreferenceScreen).when(mFragment).getPreferenceScreen();
+
+        mFragment.onSaveInstanceState(bundle);
+        mFragment.restoreSavedInstance(bundle);
+
+        assertThat(mFragment.mShowAllApps).isTrue();
+    }
+
     public static class TestFragment extends PowerUsageSummary {
 
         private Context mContext;