diff --git a/v1.3/src/VoltageMonitor.cpp b/v1.3/src/VoltageMonitor.cpp
index a776457..f093635 100644
--- a/v1.3/src/VoltageMonitor.cpp
+++ b/v1.3/src/VoltageMonitor.cpp
@@ -1,4 +1,5 @@
 #include "VoltageMonitor.h"
+#include "RGBController.h"
 
 // 初始化电压检测相关全局变量（与头文件声明对应）
 uint16_t bat_check_num = 0;
@@ -36,10 +37,12 @@ void bat_check()
     double battery = (voltage * 3.97) / 1000.0;
 
     // 电量显示（LED_BAT引脚控制）
-    if (battery >= 7.8)
+    if (battery >= 7.8){
       digitalWrite(LED_BAT, HIGH);
-    else
+    }else{
       digitalWrite(LED_BAT, LOW);
+      startLEDBlink(CRGB::Red, 200, 5);
+    }
     bat_check_num = 0;
   }
   else