diff --git a/selfdrive/ui/qt/onroad/hud.h b/selfdrive/ui/qt/onroad/hud.h
index 6638af8a0..2f1ccb136 100644
--- a/selfdrive/ui/qt/onroad/hud.h
+++ b/selfdrive/ui/qt/onroad/hud.h
@@ -7,6 +7,7 @@
 #else
 #include "selfdrive/ui/ui.h"
 #endif
+#include "common/params.h"
 
 class HudRenderer : public QObject {
   Q_OBJECT
@@ -18,9 +19,11 @@ public:
   virtual void draw(QPainter &p, const QRect &surface_rect);
 
 protected:
+  void triggerParentUpdate();
   void drawSetSpeed(QPainter &p, const QRect &surface_rect);
   void drawCurrentSpeed(QPainter &p, const QRect &surface_rect);
   void drawText(QPainter &p, int x, int y, const QString &text, int alpha = 255);
+  void drawBatteryDetailsPanel(QPainter &p, const QRect &surface_rect);
 
   float speed = 0;
   float set_speed = 0;
@@ -29,4 +32,15 @@ protected:
   bool is_metric = false;
   bool v_ego_cluster_seen = false;
   int status = STATUS_DISENGAGED;
+  struct BatteryDetails {
+    float capacity = 0.0f;       // Wh
+    float charge = 0.0f;         // Wh
+    float soc = 0.0f;            // %
+    float temperature = 0.0f;    // °C
+    bool heaterActive = false;
+    float voltage = 0.0f;        // V
+    float current = 0.0f;        // A
+    float power = 0.0f;          // W
+  };
+  BatteryDetails battery_details;
 };