diff --git a/android/build.gradle b/android/build.gradle
index fb05585..86895d4 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -71,7 +71,7 @@ dependencies {
   // For > 0.71, this will be replaced by `com.facebook.react:react-android:$version` by react gradle plugin
   //noinspection GradleDynamicVersion
   implementation "com.facebook.react:react-native:+"
-  implementation 'co.tryterra:terra-rtandroid:0.4.11'
+  implementation 'co.tryterra:terra-rtandroid:0.4.12'
 }
 
 if (isNewArchitectureEnabled()) {
diff --git a/android/src/main/AndroidManifest.xml b/android/src/main/AndroidManifest.xml
index c0cb69a..61a413c 100644
--- a/android/src/main/AndroidManifest.xml
+++ b/android/src/main/AndroidManifest.xml
@@ -1,3 +1,5 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
           package="com.terrartreact">
+  <!-- Required for requestIgnoreBatteryOptimizations(); merged into consumers. -->
+  <uses-permission android:name="android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS" />
 </manifest>
diff --git a/android/src/main/java/com/terrartreact/TerraRtReactModule.java b/android/src/main/java/com/terrartreact/TerraRtReactModule.java
index 6ef4497..58331d5 100644
--- a/android/src/main/java/com/terrartreact/TerraRtReactModule.java
+++ b/android/src/main/java/com/terrartreact/TerraRtReactModule.java
@@ -13,6 +13,11 @@
 import com.facebook.react.bridge.WritableNativeMap;
 import com.facebook.react.module.annotations.ReactModule;
 import com.facebook.react.bridge.ReadableArray;
+import android.content.Context;
+import android.content.Intent;
+import android.net.Uri;
+import android.os.PowerManager;
+import android.provider.Settings;
 import co.tryterra.terrartandroid.enums.Connections;
 import co.tryterra.terrartandroid.enums.DataTypes;
 import com.facebook.react.modules.core.DeviceEventManagerModule;
@@ -350,11 +355,82 @@ public void connectDevice(String deviceId, Promise promise){
       return;
     }
     
+    // The SDK reuses this callback for later connection updates
+    // (e.g. disconnect) — a promise must resolve exactly once.
+    final java.util.concurrent.atomic.AtomicBoolean resolved =
+        new java.util.concurrent.atomic.AtomicBoolean(false);
     this.terraRt.connectDevice(devices.get(deviceId), (success) -> {
-      map.putBoolean("success", success);
-      promise.resolve(map);
+      if (resolved.compareAndSet(false, true)) {
+        map.putBoolean("success", success);
+        promise.resolve(map);
+      }
       return Unit.INSTANCE;
     });
   }
+
+  /**
+   * Customizes the persistent notification and (re)starts the streaming
+   * foreground service. As of terra-rtandroid 0.4.12 the service lifecycle
+   * is managed by the SDK (startRealtime starts it, stopRealtime/disconnect
+   * stop it) — calling this is only needed to override the notification.
+   */
+  @ReactMethod
+  public void startForegroundService(String title, String text, Promise promise){
+    WritableMap map = new WritableNativeMap();
+    if (this.terraRt == null){
+      map.putBoolean("success", false);
+      map.putString("error", "Please initialise a terra class by using `initTerra` first");
+      promise.resolve(map);
+      return;
+    }
+    this.terraRt.startForegroundService(title, text, null);
+    map.putBoolean("success", true);
+    promise.resolve(map);
+  }
+
+  /** Stops the streaming foreground service (managed automatically by the SDK). */
+  @ReactMethod
+  public void stopForegroundService(Promise promise){
+    WritableMap map = new WritableNativeMap();
+    if (this.terraRt == null){
+      map.putBoolean("success", false);
+      map.putString("error", "Please initialise a terra class by using `initTerra` first");
+      promise.resolve(map);
+      return;
+    }
+    this.terraRt.stopForegroundService();
+    map.putBoolean("success", true);
+    promise.resolve(map);
+  }
+
+  /** Whether the app is exempt from battery optimizations (aggressive OEMs kill streams otherwise). */
+  @ReactMethod
+  public void isIgnoringBatteryOptimizations(Promise promise){
+    if (android.os.Build.VERSION.SDK_INT < android.os.Build.VERSION_CODES.M) {
+      promise.resolve(true); // no battery optimizations before API 23
+      return;
+    }
+    PowerManager pm = (PowerManager) this.reactContext.getSystemService(Context.POWER_SERVICE);
+    promise.resolve(pm != null && pm.isIgnoringBatteryOptimizations(this.reactContext.getPackageName()));
+  }
+
+  /** Opens the system dialog requesting a battery-optimization exemption. */
+  @ReactMethod
+  public void requestIgnoreBatteryOptimizations(Promise promise){
+    if (android.os.Build.VERSION.SDK_INT < android.os.Build.VERSION_CODES.M) {
+      promise.resolve(true); // no battery optimizations before API 23
+      return;
+    }
+    try {
+      Intent intent = new Intent(
+          Settings.ACTION_REQUEST_IGNORE_BATTERY_OPTIMIZATIONS,
+          Uri.parse("package:" + this.reactContext.getPackageName()));
+      intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+      this.reactContext.startActivity(intent);
+      promise.resolve(true);
+    } catch (Exception e) {
+      promise.resolve(false);
+    }
+  }
 }
 
diff --git a/ios/TerraRtReact.swift b/ios/TerraRtReact.swift
index c179f53..107b757 100644
--- a/ios/TerraRtReact.swift
+++ b/ios/TerraRtReact.swift
@@ -165,7 +165,12 @@ class TerraRtReact: NSObject {
         }
         
         if let device_ = TerraRtReact.scannedDevices[device]{
+            // The SDK reuses this callback for later connection updates
+            // (e.g. disconnect) — a promise must resolve exactly once.
+            var resolved = false
             terraRT.connectDevice(device_){success in
+                guard !resolved else { return }
+                resolved = true
                 resolve(["success": success])
             }
         }
diff --git a/package-lock.json b/package-lock.json
index eb7c7ed..b98b20f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
-  "name": "react-native-terra-rt-react",
-  "version": "0.2.3",
+  "name": "terra-rt",
+  "version": "0.2.7",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
-      "name": "react-native-terra-rt-react",
-      "version": "0.2.3",
+      "name": "terra-rt",
+      "version": "0.2.7",
       "license": "MIT",
       "dependencies": {
         "terra-react": "^1.8.6"
diff --git a/package.json b/package.json
index 7e07fa6..9750739 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "terra-rt",
-  "version": "0.2.6",
+  "version": "0.2.7",
   "description": "React Native SDK for Terra's realtime (websocket) streaming \u2014 live data from BLE devices and Apple Watch.",
   "main": "lib/commonjs/index",
   "module": "lib/module/index",
diff --git a/react-native-terra-rt-react.podspec b/react-native-terra-rt-react.podspec
index 6b40fd1..1cfb39c 100644
--- a/react-native-terra-rt-react.podspec
+++ b/react-native-terra-rt-react.podspec
@@ -17,7 +17,7 @@ Pod::Spec.new do |s|
   s.source_files = "ios/**/*.{h,m,mm,swift}"
   s.frameworks = ['HealthKit']
   s.dependency "React-Core"
-  s.dependency "TerraRTiOS", "=0.3.13"
+  s.dependency "TerraRTiOS", "=0.3.14"
 
 
   # Don't install the dependencies when we run `pod install` in the old architecture.
diff --git a/src/__tests__/index.test.tsx b/src/__tests__/index.test.tsx
index bf84291..b77f791 100644
--- a/src/__tests__/index.test.tsx
+++ b/src/__tests__/index.test.tsx
@@ -1 +1,73 @@
-it.todo('write a test');
+import { NativeModules, Platform } from 'react-native';
+
+// Must exist before src/index is imported, or the linking-error proxy trips.
+NativeModules.TerraRtReact = {
+  connectDevice: jest.fn(async () => ({ success: true, error: null })),
+  startForegroundService: jest.fn(async () => ({ success: true, error: null })),
+  stopForegroundService: jest.fn(async () => ({ success: true, error: null })),
+  isIgnoringBatteryOptimizations: jest.fn(async () => false),
+  requestIgnoreBatteryOptimizations: jest.fn(async () => true),
+};
+
+// require, not import: imports hoist above the NativeModules assignment,
+// which would capture the linking-error proxy instead of the mock.
+const {
+  isIgnoringBatteryOptimizations,
+  requestIgnoreBatteryOptimizations,
+  startForegroundService,
+  stopForegroundService,
+} = require('../index');
+
+const native = NativeModules.TerraRtReact;
+
+describe('background-streaming API (android)', () => {
+  beforeEach(() => {
+    Platform.OS = 'android';
+    jest.clearAllMocks();
+  });
+
+  it('startForegroundService forwards the notification content', async () => {
+    const res = await startForegroundService('Terra', 'Streaming live data');
+    expect(native.startForegroundService).toHaveBeenCalledWith(
+      'Terra',
+      'Streaming live data'
+    );
+    expect(res).toEqual({ success: true, error: null });
+  });
+
+  it('stopForegroundService calls through', async () => {
+    await stopForegroundService();
+    expect(native.stopForegroundService).toHaveBeenCalled();
+  });
+
+  it('battery-optimization helpers call through', async () => {
+    await expect(isIgnoringBatteryOptimizations()).resolves.toBe(false);
+    await expect(requestIgnoreBatteryOptimizations()).resolves.toBe(true);
+    expect(native.isIgnoringBatteryOptimizations).toHaveBeenCalled();
+    expect(native.requestIgnoreBatteryOptimizations).toHaveBeenCalled();
+  });
+});
+
+describe('background-streaming API (ios no-ops)', () => {
+  beforeEach(() => {
+    Platform.OS = 'ios';
+    jest.clearAllMocks();
+  });
+
+  it('resolves successfully without touching the native module', async () => {
+    await expect(startForegroundService('t', 'x')).resolves.toEqual({
+      success: true,
+      error: null,
+    });
+    await expect(stopForegroundService()).resolves.toEqual({
+      success: true,
+      error: null,
+    });
+    await expect(isIgnoringBatteryOptimizations()).resolves.toBe(true);
+    await expect(requestIgnoreBatteryOptimizations()).resolves.toBe(true);
+    expect(native.startForegroundService).not.toHaveBeenCalled();
+    expect(native.stopForegroundService).not.toHaveBeenCalled();
+    expect(native.isIgnoringBatteryOptimizations).not.toHaveBeenCalled();
+    expect(native.requestIgnoreBatteryOptimizations).not.toHaveBeenCalled();
+  });
+});
diff --git a/src/index.tsx b/src/index.tsx
index 3fd5123..b8ed95d 100644
--- a/src/index.tsx
+++ b/src/index.tsx
@@ -84,3 +84,55 @@ export function disconnect(connections: Connections): Promise<SuccessMessage> {
 export function connectWithWatchOS(): Promise<SuccessMessage> {
   return TerraRtReact.connectWithWatchOS();
 }
+
+/**
+ * ANDROID ONLY. Customizes the persistent notification shown while
+ * streaming and (re)starts the streaming foreground service. As of
+ * terra-rtandroid 0.4.12 the service lifecycle is managed by the SDK
+ * (startRealtime starts it; stopRealtime/disconnect stop it) — call this
+ * only to override the default notification content. No-op on iOS.
+ */
+export function startForegroundService(
+  notificationTitle: string,
+  notificationText: string
+): Promise<SuccessMessage> {
+  if (Platform.OS !== 'android') {
+    return Promise.resolve({ success: true, error: null });
+  }
+  return TerraRtReact.startForegroundService(
+    notificationTitle,
+    notificationText
+  );
+}
+
+/** ANDROID ONLY. Stops the streaming foreground service. No-op on iOS. */
+export function stopForegroundService(): Promise<SuccessMessage> {
+  if (Platform.OS !== 'android') {
+    return Promise.resolve({ success: true, error: null });
+  }
+  return TerraRtReact.stopForegroundService();
+}
+
+/**
+ * ANDROID ONLY. Whether the app is exempt from battery optimizations —
+ * aggressive OEM battery managers can kill background streaming without
+ * the exemption. Always true on iOS.
+ */
+export function isIgnoringBatteryOptimizations(): Promise<boolean> {
+  if (Platform.OS !== 'android') {
+    return Promise.resolve(true);
+  }
+  return TerraRtReact.isIgnoringBatteryOptimizations();
+}
+
+/**
+ * ANDROID ONLY. Opens the system dialog asking the user to exempt the app
+ * from battery optimizations. Resolves false if the dialog can't open.
+ * No-op (true) on iOS.
+ */
+export function requestIgnoreBatteryOptimizations(): Promise<boolean> {
+  if (Platform.OS !== 'android') {
+    return Promise.resolve(true);
+  }
+  return TerraRtReact.requestIgnoreBatteryOptimizations();
+}