diff --git a/firmware/config.h b/firmware/config.h
index 5ace793..09ffc77 100755
--- a/firmware/config.h
+++ b/firmware/config.h
@@ -32,8 +32,14 @@
 
 #define STATUS_LED_PIN        LED_BUILTIN
 #define ANEMOMETER_PIN        D7
+
+#ifndef BAT_PINS_D34
 #define BAT_CHARGED_PIN       D6
 #define BAT_CHARGING_PIN      D5
+#else
+#define BAT_CHARGED_PIN       D3
+#define BAT_CHARGING_PIN      D4
+#endif
 
 #define BME_SCK  13
 #define BME_MISO 12
diff --git a/firmware/config_user.h.example b/firmware/config_user.h.example
index d5e2ad3..4383af4 100644
--- a/firmware/config_user.h.example
+++ b/firmware/config_user.h.example
@@ -17,6 +17,7 @@
 //#define SENSOR_APDS9930
 #define SENSOR_BME280
 #define SENSOR_BATTERY
+//#define BAT_PINS_D34
 
 const float HUMIDITY_FACTOR = 1.0;
 const float LIGHT_FACTOR    = 1.0;
diff --git a/firmware/firmware.ino b/firmware/firmware.ino
index ff52e6a..5918152 100755
--- a/firmware/firmware.ino
+++ b/firmware/firmware.ino
@@ -45,14 +45,20 @@ void setup() {
 #endif
 
   // Pin settings
-  pinMode(BAT_CHARGED_PIN, INPUT_PULLUP);
-  pinMode(BAT_CHARGING_PIN, INPUT_PULLUP);
+  pinMode(BAT_CHARGED_PIN, INPUT);
+  pinMode(BAT_CHARGING_PIN, INPUT);
   pinMode(STATUS_LED_PIN, OUTPUT);
   pinMode(ANEMOMETER_PIN, INPUT_PULLUP);
   pinMode(A0, INPUT);
 
   digitalWrite(STATUS_LED_PIN, LOW);
 
+#ifndef BAT_PINS_D34
+  debug("D5 D6 used as battery pins");
+#else
+  debug("D3 D4 used as battery pins");
+#endif
+
 #ifdef BATTERY_POWERED
   criticalBatCheck();
 #endif
diff --git a/firmware/sensor_battery.ino b/firmware/sensor_battery.ino
index 5d41d81..4cba750 100755
--- a/firmware/sensor_battery.ino
+++ b/firmware/sensor_battery.ino
@@ -13,6 +13,9 @@ float battery_voltage() {
 }
 
 float battery_charging() {
+  //debug("charging pin=" + String(digitalRead(BAT_CHARGING_PIN)));
+  //debug("charged pin=" + String(digitalRead(BAT_CHARGED_PIN)));
+
   if (LOW == digitalRead(BAT_CHARGING_PIN)) {
     return BAT_CHARGE_STATE_CHARGING;
   } else if (LOW == digitalRead(BAT_CHARGED_PIN)) {