diff --git a/RX_FSK/src/RS41.cpp b/RX_FSK/src/RS41.cpp
index aa66d46..83d2a5b 100644
--- a/RX_FSK/src/RS41.cpp
+++ b/RX_FSK/src/RS41.cpp
@@ -685,6 +685,7 @@ int RS41::decode41(byte *data, int maxlen)
 			Serial.print("; RS41 ID ");
 			snprintf(buf, 10, "%.8s ", data+p+2);
 			Serial.print(buf);
+         sonde.si()->batteryVoltage = data[p+10] / 10.0f;
 			si->type=STYPE_RS41;
 			if(strncmp(si->id, (const char *)(data+p+2), 8)) {
 				// ID changed, i.e. new sonde on same frequency. clear calibration data
diff --git a/RX_FSK/src/Sonde.h b/RX_FSK/src/Sonde.h
index d16dbd0..fdf79cb 100644
--- a/RX_FSK/src/Sonde.h
+++ b/RX_FSK/src/Sonde.h
@@ -110,6 +110,7 @@ typedef struct st_sondeinfo {
 	float temperature = -300.0; // platinum resistor temperature
 	float tempRHSensor = -300.0; // temperature of relative humidity sensor
 	float relativeHumidity = -1.0; // relative humidity
+	float batteryVoltage = -1;
 } SondeInfo;
 // rxStat: 3=undef[empty] 1=timeout[.] 2=errro[E] 0=ok[|] 4=no valid position[°]