diff --git a/packages/frontend/apps/electron-renderer/src/app/app.tsx b/packages/frontend/apps/electron-renderer/src/app/app.tsx
index 25059deb08..4f020fb8f4 100644
--- a/packages/frontend/apps/electron-renderer/src/app/app.tsx
+++ b/packages/frontend/apps/electron-renderer/src/app/app.tsx
@@ -6,10 +6,10 @@ import { I18nProvider } from '@affine/core/modules/i18n';
 import createEmotionCache from '@affine/core/utils/create-emotion-cache';
 import { CacheProvider } from '@emotion/react';
 import { FrameworkRoot, getCurrentStore } from '@toeverything/infra';
-import { Suspense } from 'react';
+import { Suspense, useEffect } from 'react';
 import { RouterProvider } from 'react-router-dom';
 
-import { setupEffects } from './effects';
+import { setupEffects, useIsOnBattery } from './effects';
 import { DesktopLanguageSync } from './language-sync';
 import { DesktopThemeSync } from './theme-sync';
 
@@ -40,6 +40,15 @@ const future = {
 } as const;
 
 export function App() {
+  const isOnBattery = useIsOnBattery();
+
+  useEffect(() => {
+    document.body.classList.toggle('on-battery', isOnBattery);
+    return () => {
+      document.body.classList.remove('on-battery');
+    };
+  }, [isOnBattery]);
+
   return (
     <Suspense>
       <FrameworkRoot framework={frameworkProvider}>
diff --git a/packages/frontend/apps/electron-renderer/src/app/effects/index.ts b/packages/frontend/apps/electron-renderer/src/app/effects/index.ts
index 8e8017329a..105895d585 100644
--- a/packages/frontend/apps/electron-renderer/src/app/effects/index.ts
+++ b/packages/frontend/apps/electron-renderer/src/app/effects/index.ts
@@ -1,10 +1,14 @@
 import { setupEvents } from './events';
 import { setupModules } from './modules';
+import { setupPowerSourceStore } from './power';
 import { setupStoreManager } from './store-manager';
 
 export function setupEffects() {
   const { framework, frameworkProvider } = setupModules();
   setupStoreManager(framework);
   setupEvents(frameworkProvider);
+  setupPowerSourceStore();
   return { framework, frameworkProvider };
 }
+
+export { useIsOnBattery } from './power';
diff --git a/packages/frontend/apps/electron-renderer/src/app/effects/power.ts b/packages/frontend/apps/electron-renderer/src/app/effects/power.ts
new file mode 100644
index 0000000000..8c43365453
--- /dev/null
+++ b/packages/frontend/apps/electron-renderer/src/app/effects/power.ts
@@ -0,0 +1,54 @@
+import { useSyncExternalStore } from 'react';
+
+type Listener = () => void;
+
+let snapshot = false;
+let teardown: (() => void) | null = null;
+const listeners = new Set<Listener>();
+
+function emitChange() {
+  listeners.forEach(listener => listener());
+}
+
+function handlePowerSourceChange(isOnBattery: boolean) {
+  if (snapshot === isOnBattery) return;
+  snapshot = isOnBattery;
+  emitChange();
+}
+
+function ensureSubscribed() {
+  if (teardown) return;
+  if (typeof window === 'undefined') return;
+
+  const subscribePowerSource = window.__apis?.events?.power?.['power-source'];
+  if (typeof subscribePowerSource !== 'function') return;
+
+  const unsubscribe = subscribePowerSource(handlePowerSourceChange);
+  teardown = typeof unsubscribe === 'function' ? unsubscribe : null;
+}
+
+function subscribe(listener: Listener) {
+  listeners.add(listener);
+  if (listeners.size === 1) {
+    ensureSubscribed();
+  }
+  return () => {
+    listeners.delete(listener);
+    if (listeners.size === 0) {
+      teardown?.();
+      teardown = null;
+    }
+  };
+}
+
+export function setupPowerSourceStore() {
+  ensureSubscribed();
+}
+
+export function getIsOnBatterySnapshot() {
+  return snapshot;
+}
+
+export function useIsOnBattery() {
+  return useSyncExternalStore(subscribe, getIsOnBatterySnapshot, () => false);
+}
diff --git a/packages/frontend/apps/electron-renderer/src/app/global.css b/packages/frontend/apps/electron-renderer/src/app/global.css
index a338d5c565..a66ae17c4e 100644
--- a/packages/frontend/apps/electron-renderer/src/app/global.css
+++ b/packages/frontend/apps/electron-renderer/src/app/global.css
@@ -23,3 +23,12 @@ html[data-active='true']:has([data-translucent='true']) {
   opacity: 1;
   transition: opacity 0.2s;
 }
+
+/**
+ * Disable animations and transitions when on battery.
+ * We use :not(.playwright-test) to ensure tests (which rely on animations) don't break.
+ */
+body.on-battery:not(.playwright-test) * {
+  animation-duration: 0ms !important;
+  transition-duration: 0ms !important;
+}
diff --git a/packages/frontend/apps/electron-renderer/src/global.d.ts b/packages/frontend/apps/electron-renderer/src/global.d.ts
new file mode 100644
index 0000000000..7cae035db5
--- /dev/null
+++ b/packages/frontend/apps/electron-renderer/src/global.d.ts
@@ -0,0 +1,16 @@
+import type { apis, events } from '@affine/electron-api';
+
+/**
+ * Extends the global Window interface to include AFFiNE's 
+ * Electron bridge APIs and event emitters.
+ */
+declare global {
+  interface Window {
+    __apis?: {
+      apis: typeof apis;
+      events: typeof events;
+    };
+  }
+}
+
+export {};
diff --git a/packages/frontend/apps/electron/src/main/events.ts b/packages/frontend/apps/electron/src/main/events.ts
index f75fcbe3a8..41a746eb67 100644
--- a/packages/frontend/apps/electron/src/main/events.ts
+++ b/packages/frontend/apps/electron/src/main/events.ts
@@ -1,4 +1,4 @@
-import { ipcMain, webContents } from 'electron';
+import { ipcMain, powerMonitor, webContents } from 'electron';
 
 import {
   AFFINE_EVENT_CHANNEL_NAME,
@@ -7,6 +7,7 @@ import {
 import { applicationMenuEvents } from './application-menu';
 import { beforeAppQuit } from './cleanup';
 import { logger } from './logger';
+import { powerEvents } from './power';
 import { recordingEvents } from './recording';
 import { sharedStorageEvents } from './shared-storage';
 import { uiEvents } from './ui/events';
@@ -20,6 +21,7 @@ export const allEvents = {
   sharedStorage: sharedStorageEvents,
   recording: recordingEvents,
   popup: popupEvents,
+  power: powerEvents,
 };
 
 const subscriptions = new Map<number, Set<string>>();
@@ -71,6 +73,13 @@ export function registerEvents() {
     if (typeof channel !== 'string') return;
     if (action === 'subscribe') {
       addSubscription(event.sender, channel);
+      if (channel === 'power:power-source') {
+        event.sender.send(
+          AFFINE_EVENT_CHANNEL_NAME,
+          channel,
+          powerMonitor.isOnBatteryPower()
+        );
+      }
     } else {
       removeSubscription(event.sender, channel);
     }
diff --git a/packages/frontend/apps/electron/src/main/power/index.ts b/packages/frontend/apps/electron/src/main/power/index.ts
new file mode 100644
index 0000000000..93da8fddd7
--- /dev/null
+++ b/packages/frontend/apps/electron/src/main/power/index.ts
@@ -0,0 +1,29 @@
+import { powerMonitor } from 'electron';
+
+/**
+ * Power-related event handlers for the Electron main process.
+ */
+export const powerEvents = {
+  /**
+   * Subscribes to system power source changes.
+   * Emits the initial state immediately upon subscription.
+   * @param emit - Callback function to send power state to the renderer.
+   * @returns A cleanup function to remove listeners from powerMonitor.
+   */
+  'power-source': (emit: (isOnBattery: boolean) => void) => {
+    // emit initial state
+    emit(powerMonitor.isOnBatteryPower());
+
+    const onBattery = () => emit(true);
+    const onAC = () => emit(false);
+
+    powerMonitor.on('on-battery', onBattery);
+    powerMonitor.on('on-ac', onAC);
+
+    // cleanup
+    return () => {
+      powerMonitor.off('on-battery', onBattery);
+      powerMonitor.off('on-ac', onAC);
+    };
+  },
+};
diff --git a/packages/frontend/native/index.d.ts b/packages/frontend/native/index.d.ts
index e85784fa3b..99ebd4f4c5 100644
--- a/packages/frontend/native/index.d.ts
+++ b/packages/frontend/native/index.d.ts
@@ -19,10 +19,10 @@ export declare class ApplicationStateChangedSubscriber {
 }
 
 export declare class AudioCaptureSession {
-  stop(): void
   get sampleRate(): number
   get channels(): number
   get actualSampleRate(): number
+  stop(): void
 }
 
 export declare class ShareableContent {
@@ -31,9 +31,9 @@ export declare class ShareableContent {
   constructor()
   static applications(): Array<ApplicationInfo>
   static applicationWithProcessId(processId: number): ApplicationInfo | null
-  static isUsingMicrophone(processId: number): boolean
   static tapAudio(processId: number, audioStreamCallback: ((err: Error | null, arg: Float32Array) => void)): AudioCaptureSession
   static tapGlobalAudio(excludedProcesses: Array<ApplicationInfo> | undefined | null, audioStreamCallback: ((err: Error | null, arg: Float32Array) => void)): AudioCaptureSession
+  static isUsingMicrophone(processId: number): boolean
 }
 
 export declare function decodeAudio(buf: Uint8Array, destSampleRate?: number | undefined | null, filename?: string | undefined | null, signal?: AbortSignal | undefined | null): Promise<Float32Array>
diff --git a/tests/kit/src/playwright.ts b/tests/kit/src/playwright.ts
index b9b120b62e..d4dfc9d53c 100644
--- a/tests/kit/src/playwright.ts
+++ b/tests/kit/src/playwright.ts
@@ -71,6 +71,14 @@ export const test = baseTest.extend<{
     await use(page);
   },
   context: async ({ context }, use) => {
+    // Force-mark the body so global.css knows we are in a test.
+    // This keeps animations ON (0.1s) for tests, but OFF (0ms) for battery users.
+    await context.addInitScript(() => {
+      window.addEventListener('DOMContentLoaded', () => {
+        document.body.classList.add('playwright-test');
+      });
+    });
+
     // workaround for skipping onboarding redirect on the web
     await skipOnboarding(context);