diff --git a/ui/square-icon-widget.slint b/ui/square-icon-widget.slint
index 20d4f7b..29db6ef 100644
--- a/ui/square-icon-widget.slint
+++ b/ui/square-icon-widget.slint
@@ -2,7 +2,7 @@ export component SquareIconWidget {
     // Basic parameters shared by all square icon widgets
     in property <int> bar_height;
     in property <string> icon_text;
-    in property <int> icon_font_size;
+    in property <int> icon_font_size: bar_height - 3;
     in property <string> tooltip_text;
 
     // Colors
diff --git a/ui/topbar.slint b/ui/topbar.slint
index e5e93af..d2ec9dd 100644
--- a/ui/topbar.slint
+++ b/ui/topbar.slint
@@ -219,6 +219,7 @@ export component TopBar inherits Window {
                         icon_text: root.battery_icon;
                         tooltip_text: root.battery_tooltip;
                         icon_color: root.battery_icon_color;
+                        icon_font_size: root.bar_height - 9;
                         /*bg_normal: root.battery_bg_normal;
                         bg_hover: root.battery_bg_hover;
                         bg_clicked: root.battery_bg_clicked;*/