diff --git a/dashboard/src/battery.rs b/dashboard/src/battery.rs
new file mode 100644
index 0000000..1f6570a
--- /dev/null
+++ b/dashboard/src/battery.rs
@@ -0,0 +1,20 @@
+use slint::Weak;
+use tokio::sync::mpsc::UnboundedSender;
+
+use crate::{error::AppError, messages::EventMessage, ui::AppWindow};
+
+pub async fn battery_listener(
+    app_weak: Weak<AppWindow>,
+    mut s2c_tx: UnboundedSender<EventMessage>,
+) -> Result<(), AppError> {
+    let manager = ::battery::Manager::new()?;
+
+    let battery = manager
+        .batteries()?
+        .next()
+        .ok_or_else(|| AppError::NoBattery)??;
+
+    dbg!(battery);
+
+    Ok(())
+}
diff --git a/dashboard/src/error.rs b/dashboard/src/error.rs
index d73b1eb..68220ac 100644
--- a/dashboard/src/error.rs
+++ b/dashboard/src/error.rs
@@ -6,12 +6,15 @@ pub enum AppError {
     #[error("HASS_TOKEN is not set")]
     MissingToken,
 
-    #[error("invalid HASS_URL")]
+    #[error("Invalid HASS_URL")]
     InvalidUrl,
 
     #[error("Unsupported HASS_URL scheme: {0}")]
     InvalidScheme(String),
 
+    #[error("No battery found")]
+    NoBattery,
+
     #[error(transparent)]
     SlintPlatform(#[from] slint::PlatformError),
 
diff --git a/dashboard/src/main.rs b/dashboard/src/main.rs
index adb61fd..89eb1c3 100644
--- a/dashboard/src/main.rs
+++ b/dashboard/src/main.rs
@@ -1,3 +1,4 @@
+mod battery;
 mod error;
 mod ha_ext;
 mod home_assistant;
@@ -19,18 +20,6 @@ use crate::{
 async fn main() -> Result<(), AppError> {
     dotenvy::dotenv().ok();
 
-    let manager = battery::Manager::new()?;
-
-    for (idx, maybe_battery) in manager.batteries()?.enumerate() {
-        let battery = maybe_battery?;
-        println!("Battery #{}:", idx);
-        println!("Vendor: {:?}", battery.vendor());
-        println!("Model: {:?}", battery.model());
-        println!("State: {:?}", battery.state());
-        println!("Time to full charge: {:?}", battery.time_to_full());
-        println!();
-    }
-
     #[cfg(not(feature = "dev"))]
     slint::platform::set_platform(Box::new(trekstor::Trekstor::new())).expect("set platform");
 
@@ -43,6 +32,11 @@ async fn main() -> Result<(), AppError> {
 
     ui::bind_buttons(&app, c2s_tx);
 
+    tokio::spawn({
+        let s2c_tx = s2c_tx.clone();
+        battery::battery_listener(app.as_weak(), s2c_tx)
+    });
+
     // listen for data
     tokio::spawn(ui::update_listener(app.as_weak(), s2c_rx));
 
diff --git a/dashboard/src/messages.rs b/dashboard/src/messages.rs
index a1eb2da..78bda63 100644
--- a/dashboard/src/messages.rs
+++ b/dashboard/src/messages.rs
@@ -1,3 +1,4 @@
+use battery::units::Ratio;
 use hass_rs::HassEntity;
 
 use crate::home_assistant::CalendarEvent;
@@ -17,4 +18,5 @@ pub enum EventMessage {
     EntityUpdated(HassEntity),
     EntityRemoved(HassEntity),
     CalendarUpdated(Vec<CalendarEvent>),
+    BatteryPercentage(Ratio),
 }
diff --git a/dashboard/src/ui.rs b/dashboard/src/ui.rs
index a5de969..5e7961a 100644
--- a/dashboard/src/ui.rs
+++ b/dashboard/src/ui.rs
@@ -6,6 +6,7 @@ use crate::{
     messages::{CommandMessage, EventMessage},
 };
 
+use battery::units::Ratio;
 use hass_rs::HassEntity;
 use paste::paste;
 use slint::{Model, ModelRc, VecModel, Weak, language::ColorScheme};
@@ -121,6 +122,11 @@ pub fn apply_calendars(app: &Weak<AppWindow>, entities: Vec<CalendarEvent>) {
     }
 }
 
+pub fn apply_battery(app: &Weak<AppWindow>, batt: Ratio) {
+    // ..
+    dbg!(batt);
+}
+
 pub fn apply_state(app: &Weak<AppWindow>, entities: Vec<HassEntity>) {
     if let Err(err) = app.upgrade_in_event_loop(move |app| {
         apply_theme(&app, &entities);
@@ -189,6 +195,9 @@ pub async fn update_listener(
             EventMessage::CalendarUpdated(events) => {
                 apply_calendars(&app_weak, events);
             }
+            EventMessage::BatteryPercentage(batt) => {
+                apply_battery(&app_weak, batt);
+            }
         }
     }
 }