# What is battery optimization on Android? — Adinand Auto File Sorter Last reviewed: October 21, 2026. HTML version: https://adinandsorter.com/answers/what-is-battery-optimization-on-android **It is not one switch. On a typical Android phone three different settings go by names like it, and they hold back different things.** One is a choice made per app, one is the phone learning your habits, and one is a mode you turn on when the battery is low. Knowing which is which is the difference between fixing a late notification and draining your battery for nothing. ## 1. The per-app choice: Optimized or Unrestricted

This is the setting most people mean. On Google's own devices it sits under the app's battery entry, at **Allow background usage**, with two options. Google describes "Optimized" as "Recommended for most apps. Apps will make the most efficient use of your battery", while "Unrestricted" lifts the limits on what the app may do in the background ([*Check battery level and usage on your Pixel Tablet*, Google Pixel Tablet Help](https://support.google.com/googlepixeltablet/answer/13555454?hl=en), read 21 October 2026). The Pixel phone help adds a safeguard you may already have met: "If an app causes an abnormal battery drain, you’ll get a notification to optimize your battery usage" ([*Keep Adaptive Battery & battery optimization on*, Pixel Phone Help](https://support.google.com/pixelphone/answer/7015477?hl=en), read 21 October 2026).

## 2. Adaptive Battery: the phone learning your habits

This one is phone-wide. The same Pixel page puts it simply: "If you keep Adaptive Battery on, apps that you use less often will run less while you're not using them." It is candid about the cost, too: "To extend battery life, it may reduce performance and delay notifications." And it needs time: "When you set up a new device or after a factory reset, optimization may take up a few weeks to take full effect." On a Pixel the switch is under **Settings › Battery › Battery Saver › Adaptive Battery** (all from the Pixel phone page above). An app you rarely open is therefore treated more strictly than one you use every day, even with the per-app setting untouched.

## 3. Battery Saver: a mode for when you are running low

Battery Saver is the bluntest of the three and is meant to be temporary. Android's help says that "When Battery Saver is on, it turns on Dark theme and limits or turns off background activity, so some visual effects, certain features, network connections, and apps may experience delays in this mode" ([*Get the most life from your Android device's battery*, Android Help](https://support.google.com/android/answer/7664692?hl=en), read 21 October 2026). You can schedule it or switch it off automatically from **Settings › Battery › Battery Saver**. That page also says "Some Android phones come with a battery saver or low power mode", and sends you to the phone maker for details, so the name and the exact limits vary.

## What all three sit on top of

Underneath the settings, Android rations background work by itself. Its developer guide says "The system prioritizes apps' requests for resources based on the device state, app state and the app's standby bucket" ([*Power management resource limits*, Android Developers](https://developer.android.com/topic/performance/power/power-details), read 21 October 2026). The device state that matters most is [Doze](https://adinandsorter.com/answers/what-is-doze-mode-on-android), and the buckets are explained on [our standby buckets page](https://adinandsorter.com/answers/android-app-standby-buckets).

## Should you switch any of it off?

Our view: leave all three as they are for almost every app. The exception is an app whose whole job happens while you are not looking, such as an alarm, a fitness tracker or a sync tool, that is visibly arriving late. Change the per-app setting for that one app and leave Adaptive Battery alone. The exact screens, including Samsung's sleeping-apps lists, are on [our page about letting apps work in the background](https://adinandsorter.com/answers/allow-apps-to-work-in-background).

## Where Adinand Auto File Sorter meets these settings

Only its background sorting, a Pro feature, is affected; a manual Sort Now is free and runs while the app is open. Background runs are scheduled through Android's WorkManager, so every brake on this page can push a run later, and the app does not ask to be exempted. If runs have stopped happening, its health indicator tells you, so you decide whether to change the per-app setting rather than guessing.

Related: [How to allow apps to work in the background](https://adinandsorter.com/answers/allow-apps-to-work-in-background) · [What is Doze mode on Android?](https://adinandsorter.com/answers/what-is-doze-mode-on-android) · [Android app standby buckets, explained](https://adinandsorter.com/answers/android-app-standby-buckets) · [Why background apps stop on Android](https://adinandsorter.com/answers/why-background-apps-stop-on-android)