diff --git a/src/com/android/settings/fuelgauge/BatteryUtils.java b/src/com/android/settings/fuelgauge/BatteryUtils.java
index 3c493b9..e8668d1 100644
--- a/src/com/android/settings/fuelgauge/BatteryUtils.java
+++ b/src/com/android/settings/fuelgauge/BatteryUtils.java
@@ -214,6 +214,11 @@
         }
 
         if (totalActivityTimeMs >= 10 * DateUtils.MINUTE_IN_MILLIS) {
+            if (screenSipper == null) {
+                Log.e(TAG, "screen sipper is null even when app screen time is not zero");
+                return;
+            }
+
             final double screenPowerMah = screenSipper.totalPowerMah;
             for (int i = 0, size = sippers.size(); i < size; i++) {
                 final BatterySipper sipper = sippers.get(i);
diff --git a/tests/robotests/src/com/android/settings/fuelgauge/BatteryUtilsTest.java b/tests/robotests/src/com/android/settings/fuelgauge/BatteryUtilsTest.java
index 8b1076d..e05ff52 100644
--- a/tests/robotests/src/com/android/settings/fuelgauge/BatteryUtilsTest.java
+++ b/tests/robotests/src/com/android/settings/fuelgauge/BatteryUtilsTest.java
@@ -377,6 +377,18 @@
     }
 
     @Test
+    public void testSmearScreenBatterySipper_screenSipperNull_shouldNotCrash() {
+        final BatterySipper sipperFg = createTestSmearBatterySipper(TIME_FOREGROUND,
+                BATTERY_APP_USAGE, 2 /* uid */, false /* isUidNull */);
+
+        final List<BatterySipper> sippers = new ArrayList<>();
+        sippers.add(sipperFg);
+
+        // Shouldn't crash
+        mBatteryUtils.smearScreenBatterySipper(sippers, null /* screenSipper */);
+    }
+
+    @Test
     public void testCalculateRunningTimeBasedOnStatsType() {
         assertThat(mBatteryUtils.calculateRunningTimeBasedOnStatsType(mBatteryStatsHelper,
                 BatteryStats.STATS_SINCE_CHARGED)).isEqualTo(TIME_SINCE_LAST_FULL_CHARGE_MS);