How to improve phone battery life (2026)
Quick Answer
To improve phone battery life, first find out what is draining it: a failing battery, power-hungry apps, poor signal, a bright display, or constant background activity are the usual causes. Use your phone’s built-in battery usage and battery health tools, then reduce screen brightness and screen-on time, limit background activity, update software, and replace the battery if its health is poor or the phone shuts down unexpectedly.
Overview
Poor battery life is usually caused by one of three things: the battery has worn out, the phone is working harder than it should, or a particular app or setting is draining power in the background. In practice, the biggest drains are often screen brightness, high-refresh displays, mobile signal searching, GPS use, video streaming, always-on display, push syncing, and apps that keep running when you are not using them. Heat can also make battery performance worse and speed up long-term battery ageing. The best approach is to diagnose before changing lots of settings at random. Both Android and iPhone include battery screens that show which apps and features have used the most power, and some phones also show battery health or service warnings. Once you know the cause, target the fix: adjust display and connectivity settings, restrict background activity for problem apps, install system and app updates, and remove apps that behave badly. If the phone still drains quickly after basic checks, battery health may be the issue, especially on an older device. Most battery-life problems can be improved at home without tools. You should consider professional help if the battery is swollen, the phone gets unusually hot, shuts down unexpectedly, or battery health indicates service or replacement is needed.
Who this is for
Anyone whose smartphone battery runs down too quickly, whether on iPhone or Android, and who wants practical troubleshooting before paying for a repair or replacement.
What you’ll need
- Your phone and charger
- Access to battery settings
- Recent app update access through the App Store or Google Play
- A little time to observe battery use over part of a normal day
Before you start
Charge the phone normally, then check whether the problem is new or long-standing. Note whether the battery drains mainly during active use, in standby, or only in certain places such as areas with weak signal. If the phone is physically damaged, swollen, or unusually hot, stop troubleshooting and seek professional help.
Step-by-step
- 1
Check battery usage and battery health
Open the phone’s battery settings and review which apps or system features have used the most power. On iPhone, also check Battery Health if available. On Android, look for battery usage details and any battery or care section your manufacturer provides.
Why: This tells you whether the issue is normal heavy use, a misbehaving app, poor signal, or an ageing battery. Fixes are different for each cause.
- 2
Reduce display-related drain first
Lower screen brightness, enable auto-brightness if it works well on your device, shorten screen timeout, and turn off always-on display if you do not need it. If your phone offers a higher refresh rate, consider switching to a standard mode when battery life matters more than smoothness.
Why: The display is often one of the largest power users, so these changes can improve battery life quickly without affecting core phone functions.
- 3
Find and control background-draining apps
If one app is using an unusually large share of battery, update it first. If the drain continues, restrict its background activity, reduce notifications and location access, log out when not needed, or uninstall it. Pay particular attention to social media, navigation, streaming, and messaging apps with constant syncing.
Why: A single badly behaved app can drain battery even when the screen is off, making the phone seem like it has a hardware problem when it does not.
- 4
Improve connectivity settings
Use Wi‑Fi when it is stable instead of weak mobile data, and turn off Bluetooth, personal hotspot, or location services when you do not need them. In areas with very poor mobile signal, battery drain may improve if you limit unnecessary network use or temporarily use airplane mode when you do not need calls or data.
Why: Phones use extra power when searching for signal or maintaining multiple wireless connections in the background.
- 5
Turn on built-in power saving features
Enable Low Power Mode on iPhone or Battery Saver on Android when battery life matters most. If your phone offers adaptive battery or app sleep features, leave them on unless they interfere with an app you rely on.
Why: These features reduce background activity, visual effects, and syncing in a controlled way, usually with less trial and error than manual tweaking.
- 6
Update the system and apps, then restart
Install pending operating system and app updates from the official app store and your phone’s system updater, then restart the phone. If the battery problem started immediately after an update, monitor for a short period because indexing or background optimisation can temporarily increase power use.
Why: Updates often fix bugs that cause abnormal battery drain, and a restart can clear stuck processes.
- 7
Check charging habits and heat exposure
Use a reputable charger and cable, keep the phone out of excessive heat, remove it from direct sun, and avoid heavy gaming or video use if the phone is already hot. If charging is unreliable, test with another known-good cable and charger approved for your device.
Why: Heat accelerates battery ageing, and poor charging accessories can leave you with less usable charge or inconsistent performance.
- 8
Decide whether the battery needs professional replacement
If the phone is older, drains quickly even after software fixes, shuts down unexpectedly, or shows a battery service warning, arrange battery service through the manufacturer or an authorised repairer. Back up your data first.
Why: Worn lithium-ion batteries lose capacity over time and no setting change can fully restore that lost capacity.
Why this works
Phone battery life improves when you either reduce the work the phone must do or restore its ability to store charge. Display power, radio activity, background processing, location services, and ageing battery cells are the main factors, so targeting them gives the most reliable results.
Common mistakes to avoid
- Changing many settings at once without checking battery usage first
- Assuming fast drain always means the battery itself is faulty
- Using task-killer apps or dubious battery booster apps
- Ignoring poor mobile signal as a major cause of drain
- Continuing to use a phone that is swollen, damaged, or overheating
Troubleshooting
Battery drains quickly even when the phone is idle
Check battery usage for apps running in the background, disable unnecessary background refresh or background activity, review location permissions, and restart the phone.
Battery life is much worse in one building or area
Poor signal is likely. Use stable Wi‑Fi if available, reduce mobile data use, or use airplane mode when you do not need connectivity.
Phone gets hot and battery drops fast during normal use
Stop intensive apps, remove the phone from heat or direct sun, update apps and system software, and seek repair if overheating continues during light use.
Battery percentage falls suddenly or the phone shuts off before empty
This often points to battery wear or a calibration mismatch. Install updates, restart, and if it keeps happening, book a battery health check or replacement.
Battery improved after charging but falls very fast while streaming or gaming
Heavy workloads are demanding by nature. Lower brightness, use headphones instead of loudspeaker if practical, close other apps, and expect shorter runtime during these tasks.
Drain started just after installing a new app
Update or remove the app and monitor battery usage again. Revoke unnecessary permissions such as always-on location if the app does not need them.
Compare your options
Power saving mode
Best for: Quick improvement without much setup
Pros: Easy to enable, built into the phone, often reduces background activity effectively
Cons: May limit performance, syncing, or some visual features
Manual app and settings optimisation
Best for: Finding and fixing a specific drain cause
Pros: More targeted, can preserve performance where you need it
Cons: Takes more time and requires checking battery usage carefully
Battery replacement
Best for: Older phones with clear battery wear or service warnings
Pros: Can restore much of the original endurance if the battery is the issue
Cons: Costs more than software changes and should be done by a qualified repairer
| Option | Best for | Pros | Cons |
|---|---|---|---|
| Power saving mode | Quick improvement without much setup | Easy to enable, built into the phone, often reduces background activity effectively | May limit performance, syncing, or some visual features |
| Manual app and settings optimisation | Finding and fixing a specific drain cause | More targeted, can preserve performance where you need it | Takes more time and requires checking battery usage carefully |
| Battery replacement | Older phones with clear battery wear or service warnings | Can restore much of the original endurance if the battery is the issue | Costs more than software changes and should be done by a qualified repairer |
Alternatives
- Carry a reputable power bank if you cannot reduce heavy daily use
- Use a charger at your desk or in the car if replacement is not worthwhile yet
- Upgrade to a newer phone if both battery wear and overall performance are poor
Pro tips
- Check battery use over a normal day rather than immediately after a major system update
- If you rarely need constant location tracking, set apps to use location only while in use
- Dark mode may help on some phones with OLED displays, but screen brightness usually matters more
- If one app keeps appearing at the top of battery usage, fix that app before changing everything else
- Disable features you never use, such as hotspot or always-on display
Safety notes
- Do not use, charge, or puncture a phone with a swollen battery
- If the phone becomes very hot during light use or charging, disconnect it and have it checked
- Use charging accessories from reputable sources and follow the phone maker’s guidance
- Do not attempt to remove a built-in battery unless you are trained and have the correct tools
What this guide does not cover: This guide covers general battery-life troubleshooting for iPhone and Android phones. It does not give model-specific menu paths for every device, and it does not cover internal battery replacement procedures.
Cost considerations
Most battery-life fixes are free and involve settings changes or software updates. Battery replacement can be worthwhile if the phone is otherwise in good condition, but use authorised or reputable repair services because poor-quality replacement batteries can be unsafe and may perform badly.
Frequently asked questions
Does closing all apps save battery?+
Not usually. Modern phones manage apps automatically, and force-closing everything can sometimes use more power when apps reopen. Focus on apps that the battery screen shows are using unusual power.
Should I let the battery go to empty before recharging?+
No. Lithium-ion batteries do not need regular full discharges for normal use. Routine deep discharges are generally unnecessary and can add wear over time.
Can a software update reduce battery life?+
Temporarily, yes. After a major update, the phone may index content or optimise apps in the background. If the drain continues beyond the initial settling period, check battery usage for a specific cause.
Is fast charging bad for battery life?+
Use the charging system intended for your phone and follow the manufacturer’s guidance. Heat is more harmful than the charging speed label itself, so avoid charging in very hot conditions or under bedding.
How do I know if the battery itself is worn out?+
Signs include much shorter runtime than before, sudden percentage drops, unexpected shutdowns, service warnings, swelling, or rapid drain despite careful settings and normal app use.
Sources & references
Guidance on this page is traced to documented sources. Last checked 24 September 2026.
- Apple Support — Batteries - Maximising Performance · manufacturer
Supports guidance on lithium-ion battery ageing, battery health concepts, temperature effects, and iPhone battery management.
- Google Help — Extend battery life on your Android device · manufacturer
Supports guidance on checking battery use, using Battery Saver, reducing screen drain, and controlling background activity on Android.
Core battery-saving principles stay fairly stable, but menu names, battery tools, and power-saving features change regularly with phone models and software versions.