Index: firmware/App/Drivers/Battery.c
===================================================================
diff -u -r6a56af179b733faed0a3d3013a2b0459d8d4cc61 -rcf62b937520e0ec38b86d65f1adbbc962d64f2a7
--- firmware/App/Drivers/Battery.c	(.../Battery.c)	(revision 6a56af179b733faed0a3d3013a2b0459d8d4cc61)
+++ firmware/App/Drivers/Battery.c	(.../Battery.c)	(revision cf62b937520e0ec38b86d65f1adbbc962d64f2a7)
@@ -138,7 +138,6 @@
 
 static OVERRIDE_F32_T batteryRemCapacity_mAh = { 0.0, 0.0, 0.0, 0 };        ///< Battery pack remaining capacity (in mAh).
 static U32 lastBatteryMonitorTime = 0;                                      ///< Previous battery monitor time.
-static U32 lostACPowerPersistentCount = 0;                                  ///< Persistent count for AC power lost alarm.
 static U32 commFaultPersistentCount = 0;                                    ///< Persistence count for battery comm fault.
 
 static BATTERY_MANAGEMENT_ENUM_T current_BM_value;
@@ -171,7 +170,6 @@
 void initBattery( void )
 {
     lastBatteryMonitorTime = 0;
-    lostACPowerPersistentCount = 0;
     commFaultPersistentCount = 0;
 
     current_BM_value =  BEGINNING_OF_LIST;
@@ -472,6 +470,8 @@
  *************************************************************************/
 static void getBatteryManagementData(void)
 {
+    HD_OP_MODE_T opMode = getCurrentOperationMode();
+
     // Increment the position in the enum. Starting value is BEGINNING_OF_LIST (0), so on the first
     //    cycle through this function it will be set to the first valid position (1)
     current_BM_value += 1;
@@ -624,17 +624,22 @@
             {
                 if ( 0 == ( BatteryStatusData.BatteryChargerStatus & BATTERY_CHARGER_STATUS_AC_PRESENT_MASK ) )
                 {
-                    if ( ++lostACPowerPersistentCount > AC_POWER_LOST_PERSISTENT_COUNT )
-                    {
 #ifndef DISABLE_BATT_COMM
+                    // Standby, Service, or Treatment Parameters mode
+                    if ( opMode == MODE_STAN || opMode == MODE_SERV || opMode == MODE_TPAR )
+                    {
                         SET_ALARM_WITH_1_U32_DATA( ALARM_ID_HD_AC_POWER_LOST, BatteryStatusData.BatteryChargerStatus );
-#endif
                     }
+                    // Pre-Treatment, Treatment, or Post-Treatment mode
+                    else if( opMode == MODE_PRET || opMode == MODE_TREA || opMode == MODE_POST )
+                    {
+                        SET_ALARM_WITH_1_U32_DATA( ALARM_ID_HD_AC_POWER_LOST_SECOND, BatteryStatusData.BatteryChargerStatus );
+                    }
+#endif
                 }
                 else
                 {
                     clearAlarmCondition( ALARM_ID_HD_AC_POWER_LOST );
-                    lostACPowerPersistentCount = 0;
                 }
             }