Added battery health and made it configurable

dots/.config/quickshell/ii/modules/bar/BatteryPopup.qml

@@ -63,6 +63,29 @@ StyledPopup {
                 text: Battery.isCharging ? Translation.tr("Time to full:") : Translation.tr("Time to empty:")
                 color: Appearance.colors.colOnSurfaceVariant
             }
+            RowLayout {
+                spacing: 5
+                visible: Config.options.battery.showHealth
+                Layout.fillWidth: true
+
+                MaterialSymbol {
+                    text: "healing"
+                    color: Appearance.colors.colOnSurfaceVariant
+                    iconSize: Appearance.font.pixelSize.large
+                }
+
+                StyledText {
+                    text: Translation.tr("Health:")
+                    color: Appearance.colors.colOnSurfaceVariant
+                }
+
+                StyledText {
+                    Layout.fillWidth: true
+                    horizontalAlignment: Text.AlignRight
+                    color: Appearance.colors.colOnSurfaceVariant
+                    text: `${(Battery.health).toFixed(1)}%`
+                }
+            }
             StyledText {
                 Layout.fillWidth: true
                 horizontalAlignment: Text.AlignRight

dots/.config/quickshell/ii/modules/common/Config.qml

@@ -257,6 +257,7 @@ Singleton {
                 property int full: 101
                 property bool automaticSuspend: true
                 property int suspend: 3
+                property bool showHealth: true
             }
 
             property JsonObject conflictKiller: JsonObject {

dots/.config/quickshell/ii/scripts/battery/calculate_health.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+
+# This just guesses that the BAT0 is the actuall battery
+full=$(cat /sys/class/power_supply/BAT0/charge_full)
+design=$(cat /sys/class/power_supply/BAT0/charge_full_design)
+
+if [ "$design" -gt 0 ]; then # basically if design > 0
+    awk "BEGIN { printf \"%.1f\n\", ($full/$design)*100 }"
+else
+    echo "Error"
+fi

dots/.config/quickshell/ii/services/Battery.qml

@@ -31,6 +31,29 @@ Singleton {
     property real timeToEmpty: UPower.displayDevice.timeToEmpty
     property real timeToFull: UPower.displayDevice.timeToFull
 
+    property real health: 0
+    Process {
+        id: batteryProcess
+        running: Config.options.battery.showHealth
+        command: [
+            "bash",
+            `${FileUtils.trimFileProtocol(Directories.scriptPath)}/battery/calculate-health.sh`
+        ]
+
+        stdout: StdioCollector {
+            onStreamFinished: {
+                const output = text.trim()
+                const value = Number(output)
+                if (!isNaN(value)) {
+                    root.health = value
+                    console.log("Battery health:", value)
+                } else {
+                    console.warn("Battery script output invalid:", output)
+                }
+            }
+        }
+    }
+
     onIsLowAndNotChargingChanged: {
         if (!root.available || !isLowAndNotCharging) return;
         Quickshell.execDetached([