diff --git a/src/AXP.cpp b/src/AXP.cpp
index ab16dec7..28380390 100644
--- a/src/AXP.cpp
+++ b/src/AXP.cpp
@@ -118,7 +118,11 @@ void AXP::begin() {
         ina3221.begin(&Wire1);
         axp2101.set_lcd_back_light_voltage(3000);
         axp2101.set_lcd_and_tf_voltage(3300);
-        axp2101.set_bus_5v(true);
+        if (ina3221.getVoltage(INA3221_CH2) > 4.5f)
+            axp2101.set_bus_5v(false);
+        else {
+            axp2101.set_bus_5v(true);
+        }
         axp2101.set_sys_led(true);
     } else {
         _pmic = pmic_unknown;
diff --git a/src/AXP192.cpp b/src/AXP192.cpp
index 5c2b4957..d8a5b432 100644
--- a/src/AXP192.cpp
+++ b/src/AXP192.cpp
@@ -59,8 +59,6 @@ void AXP192::begin() {
     delay(100);
     // I2C_WriteByteDataAt(0X15,0XFE,0XFF);
 
-    SetPeripherialsPower(true);
-
     // axp: check v-bus status
     if (Read8bit(0x00) & 0x08) {
         Write1Byte(0x30, Read8bit(0x30) | 0x80);