Add battery charge limit (#1151)

quickshell/Common/SettingsData.qml

@@ -261,6 +261,7 @@ Singleton {
     property int batterySuspendTimeout: 0
     property int batterySuspendBehavior: SettingsData.SuspendBehavior.Suspend
     property string batteryProfileName: ""
+    property int batteryChargeLimit: 100
     property bool lockBeforeSuspend: false
     property bool loginctlLockIntegration: true
     property bool fadeToLockEnabled: false

quickshell/Common/settings/SettingsSpec.js

@@ -160,6 +160,7 @@ var SPEC = {
     batterySuspendTimeout: { def: 0 },
     batterySuspendBehavior: { def: 0 },
     batteryProfileName: { def: "" },
+    batteryChargeLimit: { def: 100 },
     lockBeforeSuspend: { def: false },
     loginctlLockIntegration: { def: true },
     fadeToLockEnabled: { def: false },

quickshell/Modules/Settings/PowerSleepTab.qml

@@ -503,6 +503,24 @@ Item {
                     }
                 }
             }
+
+            SettingsCard {
+                width: parent.width
+                iconName: "tune"
+                title: I18n.tr("Advanced")
+                collapsible: true
+                expanded: false
+
+                SettingsSliderRow {
+                    text: I18n.tr("Battery Charge Limit")
+                    description: I18n.tr("Note: this only changes the percentage, it does not actually limit charging.")
+                    value: SettingsData.batteryChargeLimit
+                    minimum: 50
+                    maximum: 100
+                    defaultValue: 100
+                    onSliderValueChanged: newValue => SettingsData.set("batteryChargeLimit", newValue)
+                }
+            }
         }
     }
 }

quickshell/Services/BatteryService.qml

@@ -12,6 +12,8 @@ Singleton {
     property bool suppressSound: true
     property bool previousPluggedState: false
 
+    readonly property var scale: 100 / SettingsData.batteryChargeLimit
+
     Timer {
         id: startupTimer
         interval: 500
@@ -43,14 +45,14 @@ Singleton {
             return 0;
         if (batteryCapacity === 0) {
             if (usePreferred && device && device.ready)
-                return Math.round(device.percentage * 100);
+                return Math.round(device.percentage * 100 * scale);
             const validBatteries = batteries.filter(b => b.ready && b.percentage >= 0);
             if (validBatteries.length === 0)
                 return 0;
             const avgPercentage = validBatteries.reduce((sum, b) => sum + b.percentage, 0) / validBatteries.length;
-            return Math.round(avgPercentage * 100);
+            return Math.round(avgPercentage * 100 * scale);
         }
-        return Math.round((batteryEnergy * 100) / batteryCapacity);
+        return Math.round((batteryEnergy * 100) / batteryCapacity * scale);
     }
     readonly property bool isCharging: batteryAvailable && batteries.some(b => b.state === UPowerDeviceState.Charging)
 

quickshell/translations/en.json

@@ -869,6 +869,12 @@
     "reference": "Modules/Settings/WidgetsTabSection.qml:838, Modules/Settings/WidgetsTab.qml:168, Modules/ControlCenter/Models/WidgetModel.qml:161, Modules/ControlCenter/Widgets/BatteryPill.qml:17",
     "comment": ""
   },
+  {
+    "term": "Battery Charge Limit",
+    "context": "Battery Charge Limit",
+    "reference": "Modules/Settings/PowerSleepTab.qml:515",
+    "comment": ""
+  },
   {
     "term": "Battery and power management",
     "context": "Battery and power management",
@@ -4799,6 +4805,12 @@
     "reference": "Modules/Settings/NetworkTab.qml:744",
     "comment": ""
   },
+  {
+    "term": "Note: this only changes the displayed percentage, it does not actually limit charging.",
+    "context": "Note: this only changes the displayed percentage, it does not actually limit charging.",
+    "reference": "Modules/Settings/PowerSleepTab.qml:516",
+    "comment": ""
+  },
   {
     "term": "Notepad",
     "context": "Notepad",

quickshell/translations/template.json

@@ -1014,6 +1014,13 @@
     "reference": "",
     "comment": ""
   },
+  {
+    "term": "Battery Charge Limit",
+    "translation": "",
+    "context": "",
+    "reference": "",
+    "comment": ""
+  },
   {
     "term": "Battery and power management",
     "translation": "",
@@ -5599,6 +5606,13 @@
     "reference": "",
     "comment": ""
   },
+  {
+    "term": "Note: this only changes the displayed percentage, it does not actually limit charging.",
+    "translation": "",
+    "context": "",
+    "reference": "",
+    "comment": ""
+  },
   {
     "term": "Notepad",
     "translation": "",