diff --git a/include/battery_utils.h b/include/battery_utils.h
index a2f523d..528acf7 100644
--- a/include/battery_utils.h
+++ b/include/battery_utils.h
@@ -8,10 +8,10 @@ namespace BATTERY_Utils {
 
     void    adcCalibration();
     void    adcCalibrationCheck();
+    
     void    setup();
     float   checkInternalVoltage();
     float   checkExternalVoltage();
-    void    checkIfShouldSleep(); // ????
     void    startupBatteryHealth();
 
     String  generateEncodedTelemetryBytes(float value, bool firstBytes, byte voltageType);
diff --git a/src/LoRa_APRS_iGate.cpp b/src/LoRa_APRS_iGate.cpp
index fa6cb00..1ba284a 100644
--- a/src/LoRa_APRS_iGate.cpp
+++ b/src/LoRa_APRS_iGate.cpp
@@ -93,6 +93,7 @@ void setup() {
         delay(STARTUP_DELAY * 60 * 1000);
     #endif
 
+    // ????? kill ?????
     #ifdef HELTEC_HTCT62
         if (Config.lowPowerMode) {
             gpio_wakeup_enable(GPIO_NUM_3, GPIO_INTR_HIGH_LEVEL);
@@ -133,6 +134,7 @@ void setup() {
             Config.loramodule.rxActive = false;
         }
     #endif
+
     SLEEP_Utils::setup();
     WIFI_Utils::setup();
     NTP_Utils::setup();
@@ -152,6 +154,7 @@ void loop() {
         SLEEP_Utils::checkWakeUpFlag();
         Utils::checkBeaconInterval();
         STATION_Utils::processOutputPacketBufferUltraEcoMode();
+        Utils::checkSleepByLowBatteryVoltage(1);
         SLEEP_Utils::startSleeping();
     } else {
         WIFI_Utils::checkAutoAPTimeout();
@@ -160,10 +163,6 @@ void loop() {
             ElegantOTA.loop();
             return; // Don't process IGate and Digi during OTA update
         }
-
-        if (Config.lowVoltageCutOff > 0) {
-            BATTERY_Utils::checkIfShouldSleep();
-        }
         
         #ifdef HAS_GPS
             if (Config.beacon.gpsActive) {
diff --git a/src/battery_utils.cpp b/src/battery_utils.cpp
index 9c73b6e..25472ae 100644
--- a/src/battery_utils.cpp
+++ b/src/battery_utils.cpp
@@ -198,15 +198,6 @@ namespace BATTERY_Utils {
         // return mapVoltage(voltage, 5.05, 6.32, 4.5, 5.5); // mapped voltage
     }
 
-    void checkIfShouldSleep() {
-        if (lastBatteryCheck == 0 || millis() - lastBatteryCheck >= 15 * 60 * 1000) {
-            lastBatteryCheck = millis();            
-            if (checkInternalVoltage() < Config.lowVoltageCutOff) {
-                ESP.deepSleep(1800000000); // 30 min sleep (60s = 60e6)
-            }
-        }
-    }
-
     void startupBatteryHealth() {
         #ifdef BATTERY_PIN
             if (Config.battery.monitorInternalVoltage && checkInternalVoltage() < Config.battery.internalSleepVoltage + 0.1) {
diff --git a/src/digi_utils.cpp b/src/digi_utils.cpp
index f42ab8f..afaca86 100644
--- a/src/digi_utils.cpp
+++ b/src/digi_utils.cpp
@@ -133,7 +133,7 @@ namespace DIGI_Utils {
                 if (!thirdPartyPacket && !Utils::checkValidCallsign(Sender)) {
                     return;
                 }
-                if (STATION_Utils::check25SegBuffer(Sender, temp.substring(temp.indexOf(":") + 2)) || Config.lowPowerMode) {
+                if (STATION_Utils::check25SegBuffer(Sender, temp.substring(temp.indexOf(":") + 2))) {
                     STATION_Utils::updateLastHeard(Sender);
                     Utils::typeOfPacket(temp, 2);    // Digi
                     bool queryMessage = false;