diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadNotifier.kt b/app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadNotifier.kt
index ae9d1be7d5..c5af10a41a 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadNotifier.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadNotifier.kt
@@ -186,9 +186,9 @@ internal class DownloadNotifier(private val context: Context) {
      */
     fun onWarning(reason: String) {
         with(errorNotificationBuilder) {
-            setContentTitle(context.getString(R.string.download_notifier_downloader_title))
-            setContentText(reason)
-            setSmallIcon(android.R.drawable.stat_sys_warning)
+            setContentTitle(context.getString(R.string.label_warning))
+            setStyle(NotificationCompat.BigTextStyle().bigText(reason))
+            setSmallIcon(R.drawable.ic_warning_white_24dp)
             setAutoCancel(true)
             clearActions()
             setContentIntent(NotificationHandler.openDownloadManagerPendingActivity(context))
@@ -216,7 +216,7 @@ internal class DownloadNotifier(private val context: Context) {
                     ?: context.getString(R.string.download_notifier_downloader_title)
             )
             setContentText(error ?: context.getString(R.string.download_notifier_unknown_error))
-            setSmallIcon(android.R.drawable.stat_sys_warning)
+            setSmallIcon(R.drawable.ic_warning_white_24dp)
             clearActions()
             setContentIntent(NotificationHandler.openDownloadManagerPendingActivity(context))
             setProgress(0, 0, false)
diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/download/Downloader.kt b/app/src/main/java/eu/kanade/tachiyomi/data/download/Downloader.kt
index 99e777a4b6..e1bf847722 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/download/Downloader.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/download/Downloader.kt
@@ -11,6 +11,7 @@ import eu.kanade.tachiyomi.data.database.models.Chapter
 import eu.kanade.tachiyomi.data.database.models.Manga
 import eu.kanade.tachiyomi.data.download.model.Download
 import eu.kanade.tachiyomi.data.download.model.DownloadQueue
+import eu.kanade.tachiyomi.data.library.QUEUE_SIZE_WARNING_THRESHOLD
 import eu.kanade.tachiyomi.source.SourceManager
 import eu.kanade.tachiyomi.source.model.Page
 import eu.kanade.tachiyomi.source.online.HttpSource
@@ -263,7 +264,10 @@ class Downloader(
 
             // Start downloader if needed
             if (autoStart && wasEmpty) {
-                DownloadService.start(this@Downloader.context)
+                if (queue.size > QUEUE_SIZE_WARNING_THRESHOLD) {
+                    notifier.onWarning(context.getString(R.string.notification_size_warning))
+                }
+                DownloadService.start(context)
             }
         }
     }
diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/library/LibraryUpdateNotifier.kt b/app/src/main/java/eu/kanade/tachiyomi/data/library/LibraryUpdateNotifier.kt
index 5caf8ba773..ac9a7618ed 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/library/LibraryUpdateNotifier.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/library/LibraryUpdateNotifier.kt
@@ -88,6 +88,20 @@ class LibraryUpdateNotifier(private val context: Context) {
         )
     }
 
+    fun showQueueSizeWarningNotification() {
+        val notification = context.notificationBuilder(Notifications.CHANNEL_LIBRARY_PROGRESS) {
+            setContentTitle(context.getString(R.string.label_warning))
+            setSmallIcon(R.drawable.ic_warning_white_24dp)
+            setStyle(NotificationCompat.BigTextStyle().bigText(context.getString(R.string.notification_size_warning)))
+        }
+            .build()
+
+        context.notificationManager.notify(
+            Notifications.ID_LIBRARY_SIZE_WARNING,
+            notification,
+        )
+    }
+
     /**
      * Shows notification containing update entries that failed with action to open full log.
      *
diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/library/LibraryUpdateService.kt b/app/src/main/java/eu/kanade/tachiyomi/data/library/LibraryUpdateService.kt
index 00faa04788..ebdef98e52 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/library/LibraryUpdateService.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/library/LibraryUpdateService.kt
@@ -264,6 +264,10 @@ class LibraryUpdateService(
         mangaToUpdate = listToUpdate
             .distinctBy { it.id }
             .sortedWith(rankingScheme[selectedScheme])
+
+        if (mangaToUpdate.size > QUEUE_SIZE_WARNING_THRESHOLD) {
+            notifier.showQueueSizeWarningNotification()
+        }
     }
 
     /**
@@ -567,3 +571,5 @@ class LibraryUpdateService(
         return File("")
     }
 }
+
+const val QUEUE_SIZE_WARNING_THRESHOLD = 100
diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/notification/Notifications.kt b/app/src/main/java/eu/kanade/tachiyomi/data/notification/Notifications.kt
index c6403a25ca..753701a7b9 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/notification/Notifications.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/notification/Notifications.kt
@@ -27,6 +27,7 @@ object Notifications {
     private const val GROUP_LIBRARY = "group_library"
     const val CHANNEL_LIBRARY_PROGRESS = "library_progress_channel"
     const val ID_LIBRARY_PROGRESS = -101
+    const val ID_LIBRARY_SIZE_WARNING = -103
     const val CHANNEL_LIBRARY_ERROR = "library_errors_channel"
     const val ID_LIBRARY_ERROR = -102
 
diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/updater/UpdaterNotifier.kt b/app/src/main/java/eu/kanade/tachiyomi/data/updater/UpdaterNotifier.kt
index 6dc4bec8c5..cf8735b7b1 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/updater/UpdaterNotifier.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/updater/UpdaterNotifier.kt
@@ -117,7 +117,7 @@ internal class UpdaterNotifier(private val context: Context) {
     fun onDownloadError(url: String) {
         with(notificationBuilder) {
             setContentText(context.getString(R.string.update_check_notification_download_error))
-            setSmallIcon(android.R.drawable.stat_sys_warning)
+            setSmallIcon(R.drawable.ic_warning_white_24dp)
             setOnlyAlertOnce(false)
             setProgress(0, 0, false)
 
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index f7a8ba2f91..e260ecbf81 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -24,6 +24,7 @@
     <string name="label_extension_info">Extension info</string>
     <string name="label_help">Help</string>
     <string name="label_default">Default</string>
+    <string name="label_warning">Warning</string>
 
     <string name="unlock_app">Unlock Tachiyomi</string>
     <string name="confirm_lock_change">Authenticate to confirm change</string>
@@ -706,6 +707,7 @@
     <!-- Library update service notifications -->
     <string name="notification_check_updates">Checking for new chapters</string>
     <string name="notification_updating">Updating library… (%1$d/%2$d)</string>
+    <string name="notification_size_warning">Large updates may lead to increased battery usage and sources becoming slower</string>
     <string name="notification_new_chapters">New chapters found</string>
     <plurals name="notification_new_chapters_summary">
         <item quantity="one">For 1 title</item>