diff --git a/power/stats/aidl/aidl_api/android.hardware.power.stats/current/android/hardware/power/stats/EnergyMeasurement.aidl b/power/stats/aidl/aidl_api/android.hardware.power.stats/current/android/hardware/power/stats/EnergyMeasurement.aidl
index 341909e..4d56ccf 100644
--- a/power/stats/aidl/aidl_api/android.hardware.power.stats/current/android/hardware/power/stats/EnergyMeasurement.aidl
+++ b/power/stats/aidl/aidl_api/android.hardware.power.stats/current/android/hardware/power/stats/EnergyMeasurement.aidl
@@ -20,5 +20,6 @@
 parcelable EnergyMeasurement {
   int channelId;
   long timestampMs;
+  long durationMs;
   long energyUWs;
 }
diff --git a/power/stats/aidl/android/hardware/power/stats/EnergyMeasurement.aidl b/power/stats/aidl/android/hardware/power/stats/EnergyMeasurement.aidl
index f873849..d81914d 100644
--- a/power/stats/aidl/android/hardware/power/stats/EnergyMeasurement.aidl
+++ b/power/stats/aidl/android/hardware/power/stats/EnergyMeasurement.aidl
@@ -23,11 +23,15 @@
      */
     int channelId;
     /**
-     * Time since boot in milliseconds
+     * Approximate time of data capture in millseconds since boot
      */
     long timestampMs;
     /**
-     * Accumulated energy since boot in microwatt-seconds (uWs)
+     * Duration in milliseconds that energy has been accumulated
+     */
+    long durationMs;
+    /**
+     * Accumulated energy in microwatt-seconds (uWs)
      */
     long energyUWs;
 }
diff --git a/power/stats/aidl/android/hardware/power/stats/IPowerStats.aidl b/power/stats/aidl/android/hardware/power/stats/IPowerStats.aidl
index 85a2ce0..05e2004 100644
--- a/power/stats/aidl/android/hardware/power/stats/IPowerStats.aidl
+++ b/power/stats/aidl/android/hardware/power/stats/IPowerStats.aidl
@@ -96,7 +96,7 @@
     ChannelInfo[] getEnergyMeterInfo();
 
     /**
-     * Reports accumulated energy since boot for each specified channel.
+     * Reports accumulated energy for each specified channel.
      *
      * @param channelIds IDs of channels for which data is requested.
      *     Passing an empty list will return energy measurements for all available channels.