diff --git a/src/modules/systemlib/battery.cpp b/src/modules/systemlib/battery.cpp
index 242856904c..778708d017 100644
--- a/src/modules/systemlib/battery.cpp
+++ b/src/modules/systemlib/battery.cpp
@@ -53,13 +53,6 @@ Battery::Battery() :
 	_low_thr(this, "LOW_THR"),
 	_crit_thr(this, "CRIT_THR"),
 	_emergency_thr(this, "EMERGEN_THR"),
-	_voltage_filtered_v(-1.f),
-	_current_filtered_a(-1.f),
-	_discharged_mah(0.f),
-	_discharged_mah_loop(0.f),
-	_remaining_voltage(1.f),
-	_remaining(2.f),
-	_scale(1.f),
 	_warning(battery_status_s::BATTERY_WARNING_NONE),
 	_last_timestamp(0)
 {
diff --git a/src/modules/systemlib/battery.h b/src/modules/systemlib/battery.h
index 3bf25593ae..8fbb8b9735 100644
--- a/src/modules/systemlib/battery.h
+++ b/src/modules/systemlib/battery.h
@@ -113,13 +113,13 @@ private:
 	control::BlockParamFloat _crit_thr;
 	control::BlockParamFloat _emergency_thr;
 
-	float _voltage_filtered_v;
-	float _current_filtered_a;
-	float _discharged_mah;
-	float _discharged_mah_loop;
-	float _remaining_voltage;		///< normalized battery charge level remaining based on voltage
-	float _remaining;			///< normalized battery charge level, selected based on config param
-	float _scale;
+	float _voltage_filtered_v = -1.f;
+	float _current_filtered_a = -1.f;
+	float _discharged_mah = 0.f;
+	float _discharged_mah_loop = 0.f;
+	float _remaining_voltage = 1.f;		///< normalized battery charge level remaining based on voltage
+	float _remaining = 2.f;			///< normalized battery charge level, selected based on config param
+	float _scale = 1.f;
 	uint8_t _warning;
 	hrt_abstime _last_timestamp;
 };