From b89d3de2e611265d9534385623cf5291baa0622d Mon Sep 17 00:00:00 2001
From: dogmaphobic <mavlink@grubba.com>
Date: Sat, 4 Jul 2015 11:58:02 -0400
Subject: [PATCH] Warning and explanation for voltage drop.

---
 src/AutoPilotPlugins/PX4/PowerComponent.qml | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/src/AutoPilotPlugins/PX4/PowerComponent.qml b/src/AutoPilotPlugins/PX4/PowerComponent.qml
index 86e8d4b9d..f1c5516f8 100644
--- a/src/AutoPilotPlugins/PX4/PowerComponent.qml
+++ b/src/AutoPilotPlugins/PX4/PowerComponent.qml
@@ -310,8 +310,9 @@ QGCView {
                 visible:        showAdvanced.checked
             }
             Rectangle {
+                id: batteryRectangle
                 width: parent.width
-                height: 40
+                height: 140
                 color: palette.windowShade
                 visible: showAdvanced.checked
                 Column {
@@ -329,6 +330,23 @@ QGCView {
                             showUnits: true
                         }
                     }
+                    QGCLabel {
+                        width: batteryRectangle.width - 30
+                        wrapMode: Text.WordWrap
+                        text: "All batteries have an internal resistance. This causes the voltage to drop when under load. " +
+                              "This value tells the flight controller how much to compensate when computing the true battery minimum voltage. " +
+                              "<font color=\"yellow\">If this value is set too high, the flight controller will allow the battery to drop bellow its minimum safety " +
+                              "voltage, which will cause damage to the battery.</font>"
+                    }
+                    Row {
+                        spacing: 10
+                        QGCLabel {
+                            text: "Compensated Minimum Voltage:"
+                        }
+                        QGCLabel {
+                            text: ((battNumCells.value * battLowVolt.value) - (battNumCells.value * battVoltLoadDrop.value)).toFixed(1) + ' V'
+                        }
+                    }
                 }
             }
         } // Column
-- 
2.22.0