diff --git a/src/FlightDisplay/PreFlightBatteryCheck.qml b/src/FlightDisplay/PreFlightBatteryCheck.qml
index 9e1d86d..20a7fb3 100644
--- a/src/FlightDisplay/PreFlightBatteryCheck.qml
+++ b/src/FlightDisplay/PreFlightBatteryCheck.qml
@@ -25,6 +25,7 @@ PreFlightCheckButton {
 
     property int    failurePercent:                 40
     property bool   allowFailurePercentOverride:    false
-    property var    _batPercentRemaining:           activeVehicle ? activeVehicle.battery.percentRemaining.value : 0
+    property var    batteryValue:                   activeVehicle ? activeVehicle.battery.percentRemaining.value : 0
+    property var    _batPercentRemaining:           batteryValue ? batteryValue : 0
     property bool   _batLow:                        _batPercentRemaining < failurePercent
 }