[Published: June 24, 2026 | Last updated: June 24, 2026] | 14 min read
TL;DR
- Turning off Wi-Fi scanning and Bluetooth scanning under Location Services alone can noticeably extend daily battery life (Android Police, 2026)
- Around 70% of Android apps accessed sensitive data and tracking domains in a 2025 audit (NowSecure, 2025)
- The single biggest battery drain on any Android phone is the display — always start there
- Deleting your Advertising ID stops cross-app ad tracking without breaking any app functionality
- You can apply all 25 changes in under 30 minutes, most in under 10 seconds each
What These Android Settings Actually Do
Most Android users change the wallpaper and stop there. The settings menu sits three taps away from changes that can add two or three hours to your battery day and stop a dozen apps from quietly tracking your location, mic, and movement.
This guide covers 25 settings split across two goals: battery and privacy. Some settings serve both at once. Where that happens, it’s noted.
Path formats below follow stock Android 14/15. Samsung Galaxy devices use slightly different labels – where Samsung diverges significantly, the Samsung path is listed in brackets.
Battery Settings: 14 Changes That Have the Biggest Impact
1. Turn Off Always On Display
Always On Display keeps your screen partially lit around the clock. A battery test by DXOMARK found that Always On Display drains battery up to four times faster compared to a standard off-screen state.
Path: Settings > Display > Always On Display > toggle off
This is the first thing to turn off on a Pixel, Samsung Galaxy, or any OLED device. The AOD looks good. It costs real battery. Pick one.
2. Enable Adaptive Brightness (Not Fixed Brightness)
Adaptive brightness adjusts your screen automatically based on ambient light. Running the display at maximum brightness in a dim room is one of the most common ways people drain batteries without realising it.
Path: Settings > Display > Adaptive brightness > toggle on
Keep Adaptive brightness on, then manually nudge the slider slightly lower than it defaults to. Android learns your preference over a week or two and adjusts accordingly.
3. Shorten Screen Timeout to 15-30 Seconds
Every second your screen stays lit when you’re not looking at it is wasted battery. Most phones ship with a 1-2 minute default.
Path: Settings > Display > Screen timeout > set to 15 or 30 seconds
Short timeout also improves privacy – it gives anyone nearby less time to see or access your screen when you set it down.
4. Switch to Dark Mode Permanently
Dark mode on OLED screens (most flagships since 2019) actually turns pixels off where the screen shows black. That’s real power saved, not just reduced brightness.
Path: Settings > Display > Dark theme > Always on
DXOMARK testing confirms that permanent dark mode saves more battery than the scheduled option, because it eliminates any time spent in light mode entirely.
5. Disable Wi-Fi Scanning and Bluetooth Scanning
This is the one most people miss. Even with Wi-Fi off, Android runs background scans for nearby networks to improve location accuracy. Same with Bluetooth. Both drain battery continuously.
Path: Settings > Location > Location services > Wi-Fi scanning: off / Bluetooth scanning: off
Android Police’s 2026 testing found this change alone was enough to stop several phones from hitting battery saver mode before the end of the day.
6. Switch Location Access from “All the Time” to “While Using”
This is where battery and privacy fully overlap. Switching each app from “Allow all the time” to “Allow only while using the app” stops weather and shopping apps from pulling GPS data in the background. It also removes a major privacy exposure.
Path: Settings > Privacy > Permission manager > Location > review each app
Within a couple of days of making this change, battery-hungry weather and shopping apps dropped off the top of the battery list entirely.
7. Set App Battery Usage to “Optimized” (Not Unrestricted)
Android has three battery settings for each app: Unrestricted, Optimized, and Restricted. Most problematic apps end up on Unrestricted, which lets an app wake the CPU and pull data freely on its own schedule.
Path (Pixel): Settings > Apps > [App name] > App battery usage > Optimized
Path (Samsung): Settings > Battery > Background usage limits > Deep sleeping apps > tap “+” to add
Change messaging apps, music players, fitness trackers, and sync utilities to Optimized unless you need real-time notifications from them.
8. Put Unused Apps to Deep Sleep
When you put apps to deep sleep, it stops all background processes – Cloud backups, news feed updates, and background tasks will stop, and you’ll see immediate battery savings.
Path (Samsung): Settings > Battery > Background usage limits > Deep sleeping apps
On Pixel and stock Android, you can achieve the same by going to Settings > Apps > [App] > App battery usage > Restricted.
9. Turn Off “Mobile Data Always Active”
By default, Android stays connected to mobile data even when you’re on Wi-Fi. This lets it switch instantly when Wi-Fi drops – but it also burns battery running two radios at once.
Path: Settings > System > Developer Options > Mobile data always active > toggle off
You’ll need to enable Developer Options first: Settings > About phone > tap “Build number” seven times.
The only trade-off is a roughly 10-second delay when switching from Wi-Fi to cellular connectivity. For most people, that’s worth it.
10. Lower Display Resolution on Pixel Pro Models
This one applies only to Pixel Pro and Pixel XL variants. On Pixel Pro models, lowering the resolution from 1440p QHD+ to FHD+ saves battery with a single tap, and most users can’t tell the difference at normal viewing distance.
Path: Settings > Display & touch > Screen resolution > FHD+
11. Disable “Now Playing” on Pixel Devices
Now Playing is a Pixel feature that constantly listens to your surroundings to identify nearby songs. The constant listening is a power drain, and it runs for a feature you likely don’t remember is there.
Path: Settings > Display > Lock Screen > Now Playing > Identify songs playing nearby > off
Privacy bonus: it also stops your phone from passively recording ambient audio around you.
12. Restrict Background Data for Specific Apps
Most browsers, social apps, and video players don’t need to stay alive in the background. Apps like a browser or YouTube don’t need unrestricted background access.
Path: Settings > Apps > [App name] > Mobile data & Wi-Fi > Background data > off
Do this for any app you don’t need receiving updates or syncing when you’re not using it.
13. Disable Haptic Feedback for Keyboard
Keyboard haptics fire hundreds of times a day. Each vibration is small, but they add up across a full day of typing.
Path: Settings > Sound & vibration > Vibration & haptics > Keyboard vibration > off
Android Police notes this is one of those small changes that accumulates meaningful savings when combined with other tweaks.
14. Enable Battery Saver as a Scheduled Feature, Not an Emergency
Most people enable Battery Saver only when they’re near empty. It’s more effective as a scheduled feature. Set it to activate automatically at 30% rather than the default 15%.
Path: Settings > Battery > Battery saver > Set a schedule > Based on percentage > 30%
This avoids the emergency drain that happens when your battery drops from 20% to 0% faster than expected.
Privacy Settings: 11 Changes That Stop Tracking
15. Delete Your Advertising ID
Every Android phone ships with a unique Advertising ID (AAID). The Advertising ID is a unique identifier that advertisers use to create profiles for ad targeting and data brokering purposes.
You can delete it entirely. Once deleted, apps revert to showing generic ads instead of personalised ones, and you can toggle off Ad topics, App-suggested ads, and Ad measurement under Ad privacy for further control.
Path: Settings > Privacy > Ads > Delete advertising ID > confirm
Worth doing. It takes 15 seconds.
16. Audit the Permission Manager
Research by NowSecure in 2025 found that around 70% of Android apps accessed sensitive data and tracking domains, while more than 60% requested permissions like location, camera, or microphone.
Path: Settings > Privacy > Permission manager
Go through Location, Camera, Microphone, and Physical activity one by one. Revoke access for any app that doesn’t clearly need it.
17. Revoke Microphone Access for Non-Voice Apps
Android’s Privacy Dashboard shows which apps accessed the microphone in the last 24 hours – that’s the fastest way to catch anything you didn’t realise had permission.
Path: Settings > Privacy > Privacy dashboard > Microphone > review last 24 hours
For any app that doesn’t need your voice, set access to “Don’t allow” or “Ask every time.”
18. Revoke Physical Activity Permission from Non-Fitness Apps
In the Permission Manager, Physical activity permission is often held by map apps, insurance apps, and caller ID tools for background features you may not know are running.
Path: Settings > Privacy > Permission manager > Physical activity
Revoking it from anything that isn’t directly tracking steps or workouts stops passive tracking without affecting your actual fitness tracker.
19. Disable Usage and Diagnostics Sharing
By default, Android sends usage data back to Google. This includes app activity, crash reports, and device telemetry.
Path: Settings > Google > All services > Usage & diagnostics > off
This doesn’t change how your phone works. It stops background data transmission you didn’t explicitly agree to.
20. Review Notification Access
Android allows some apps to mirror notifications on other devices, and these companion apps can see all notifications as they arrive – messages, emails, and banking alerts included.
Path: Settings > Apps > Special app access > Notification access
Revoke access for any app you don’t actively use to mirror notifications to a watch or other device.
21. Enable Private DNS
Private DNS routes your DNS queries through an encrypted server, which blocks some network-level tracking and prevents your ISP from logging every domain you visit.
Path: Settings > Network & Internet > Private DNS > Private DNS provider hostname
Enter dns.google or one.one.one.one (Cloudflare) as your provider. Both are free.
22. Set a Short Auto-Lock Timer
A 30-second screen timeout (covered in setting 3) is the battery play. A short auto-lock timer is the privacy play. They’re not the same thing.
Path: Settings > Security > Screen lock > [your lock type] > Lock after screen timeout > set to “Immediately”
This means the lock screen activates the moment the display turns off. No gap where someone can pick up your phone.
23. Use “Approximate” Location Instead of “Precise” Where Possible
When apps ask for location access, there are two accuracy options: “Precise” uses GPS, Bluetooth, Wi-Fi, and other sensors to pinpoint your exact location. Most apps – weather, restaurant finders, news – don’t need your exact address. Approximate location (within a few km) is enough.
Path: Settings > Privacy > Permission manager > Location > [App name] > Use approximate location > on
24. Turn Off Nearby Device Scanning
Nearby device scanning means your device regularly does background scans for Bluetooth and Wi-Fi devices around you. If you don’t need highly accurate location services, it’s worth disabling this feature.
Path: Settings > Location > Location services > Nearby device scanning > off
Different from Wi-Fi scanning covered in setting 5. This one is specifically about Bluetooth-based proximity detection used by some location services.
25. Use the Privacy Dashboard as a Monthly Audit Tool
The Privacy Dashboard isn’t a setting to change once – it’s a monitoring tool. Check it monthly to catch apps that have quietly picked up new permissions after an update.
Path: Settings > Privacy > Privacy dashboard
It shows a timeline of which apps accessed the camera, microphone, location, and other sensors in the past 24 hours. Any app that surprises you there is worth investigating.
Which Settings Give You the Most Immediate Improvement
If you only have 10 minutes, start here. These five deliver the most noticeable change:
| Priority | Setting | Benefit |
|---|---|---|
| 1 | Turn off Always On Display | Biggest single battery gain |
| 2 | Disable Wi-Fi and Bluetooth scanning | Stops hidden background drain |
| 3 | Delete Advertising ID | Immediate ad tracking reduction |
| 4 | Set location to “While using” for all apps | Battery + privacy combined |
| 5 | Enable Private DNS | Blocks network-level tracking |
Common Mistakes When Changing Android Settings
Restricting the wrong apps: Battery > Restricted mode will stop notifications from apps like WhatsApp or Gmail. Only restrict apps you genuinely don’t need to hear from.
Disabling Developer Options features without understanding them: Mobile Data Always Active is safe to toggle. Other Developer Options settings can cause instability. Don’t explore that menu unless you know what a setting does.
Skipping the Permission Manager after app updates: Many apps silently request new permissions when they update. The Permission Manager audit in setting 16 needs to be a recurring check, not a one-time thing.
Confusing “screen timeout” with “auto-lock”: Screen timeout turns the display off. Auto-lock engages the lock screen. You want both short, but they’re configured separately.
Frequently Asked Questions About Android Battery and Privacy Settings
Which Android settings drain the battery the fastest?
Always On Display, location set to “Allow all the time” for multiple apps, Wi-Fi and Bluetooth background scanning, and apps set to Unrestricted battery mode are the four biggest drains. The display is the single largest power consumer on any Android device.
Does turning off location settings affect Google Maps?
No. Google Maps continues to work normally when location is set to “While using the app.” The change only stops Maps from accessing your GPS when the app is closed. Navigation, search, and all core features remain unaffected.
What is the Advertising ID and is it safe to delete?
The Advertising ID is a unique string used by apps and advertisers for personalised advertising. Starting in Android 12, users can delete it entirely, and attempts to access it will return a string of zeros rather than any identifier. Deleting it does not break any app functionality. You’ll still see ads, they’ll just be less targeted.
How do I stop apps from accessing my microphone in the background?
Go to Settings > Privacy > Privacy Dashboard > Microphone. This shows every app that accessed the microphone in the last 24 hours. For any unexpected app, go to Settings > Apps > [App name] > Permissions > Microphone > set to “Don’t allow.”
Does Private DNS slow down my internet connection?
In practice, no. DNS queries take milliseconds and encrypted DNS providers like Cloudflare (1.1.1.1) and Google (8.8.8.8) are fast enough that the difference is not measurable in everyday use. The security and privacy benefit is real; the speed cost is not.
Can I undo all of these settings if something breaks?
Yes. Every setting in this guide is reversible. If an app stops working as expected after you restrict its battery access or permissions, go back and change the relevant setting. Nothing here touches system files or requires a factory reset.
How often should I run a privacy audit on my Android phone?
Once a month is enough for most people. Check the Privacy Dashboard, look at recently updated apps in the Permission Manager, and review Location permissions for any new apps you’ve installed. The whole process takes under five minutes once you know where to look.
Key Takeaways
- The display and background location access are the two largest battery drains on most Android devices. Fix those first.
- Wi-Fi scanning and Bluetooth scanning run even with both features turned off – disable them separately under Location Services.
- Around 70% of Android apps request more permissions than they need (NowSecure, 2025). A monthly Permission Manager audit catches what individual installs miss.
- Deleting your Advertising ID, setting Private DNS, and switching to “While using” location access are the three privacy changes with the broadest impact.
- All 25 settings are reversible. Try them, then adjust based on what works for your apps and workflow.