How to save battery and extend your smartphone battery life
Why does your smartphone battery drain so fast?
Many smartphone users know the problem: at the start of the day the battery is still full, but by mid-afternoon the percentage is already in the red. A dead battery at a bad moment is frustrating, especially when you are on the go or expecting an important call.
There are many reasons why batteries drain quickly. The screen, mobile data, background apps and location services are the biggest power hogs. Fortunately, there are plenty of ways to extend your smartphone's battery life without giving up important features.
The biggest battery drainers
Before we look at solutions, it helps to know which features use the most power:
- The screen: The biggest power consumer, especially at high brightness
- Mobile data and Wi-Fi: Constantly searching for networks costs a lot of power
- GPS and location services: Constantly determining your location eats battery
- Background apps: Some apps stay active, even when you are not using them
- Push notifications: Every notification wakes up your phone
- Bluetooth: Uses power, even when nothing is connected
Optimizing your screen settings
The screen is responsible for 30 to 50 percent of battery usage. By adjusting your screen settings, you can save a lot.
Lowering the brightness
Screen brightness has the biggest impact on your battery life. Lower brightness saves a lot of power.
On iPhone:
- Open Settings > Display & Brightness
- Drag the slider to the left to lower the brightness
- Turn on Automatic so the brightness adjusts to the ambient light
On Android:
- Open Settings > Display or Screen
- Tap Brightness and lower it
- Turn on Adaptive brightness for automatic adjustment
Shortening the screen timeout
The sooner your screen turns off after inactivity, the more power you save. Set the timeout to 30 seconds or 1 minute.
On iPhone:
- Go to Settings > Display & Brightness
- Tap Auto-Lock
- Choose 30 seconds or 1 minute
On Android:
- Go to Settings > Display
- Tap Screen timeout or Sleep
- Select the shortest time you are comfortable with
Using dark mode
If your phone has an OLED or AMOLED screen, dark mode can save a lot of power. With these screen types, black pixels are turned off completely, which costs no power.
On iPhone:
- Go to Settings > Display & Brightness
- Select Dark under Appearance
On Android:
- Go to Settings > Display
- Turn on Dark theme
Managing connectivity smartly
Wireless connections such as Wi-Fi, Bluetooth and mobile data constantly use power, even when you are not actively using them.
Wi-Fi versus mobile data
Wi-Fi generally uses less power than mobile data, so use Wi-Fi whenever it is available. However, turn off Wi-Fi when you are on the go and there are no networks nearby, otherwise your phone keeps searching constantly.
Turning off Bluetooth
If you do not use Bluetooth devices such as wireless earbuds or a smartwatch, turn Bluetooth off. This saves power and stops your phone from constantly searching for devices.
Quick tip: Use Control Center or Quick Settings to quickly turn Wi-Fi and Bluetooth on and off. On iPhone, swipe down from the top right; on Android, swipe down from the top.
Airplane mode in areas with poor coverage
When you are in an area with poor mobile coverage, your phone has to work extra hard to connect. This costs a lot of power. In those situations, turn on airplane mode if you do not need a signal anyway.
Limiting location services
GPS and location services are useful for navigation and some apps, but they use a lot of power. So limit which apps have access to your location.
Adjusting location settings on iPhone
- Go to Settings > Privacy & Security > Location Services
- Review the list of apps and their location access
- Choose for each app: Never, Ask Next Time, While Using the App or Always
- Choose While Using the App for navigation apps
- Choose Never for apps that do not need your location
Adjusting location settings on Android
- Go to Settings > Location
- Tap App location permissions
- Select the access level you want for each app
- Also turn off Google Location History if you do not need it
Managing apps and background activity
Many apps stay active in the background and use power, even when you are not using them. Limiting this can extend your battery life.
Turning off background refresh on iPhone
- Go to Settings > General > Background App Refresh
- You can turn it off completely or decide per app
- Turn it off for apps that do not need constant updates
Limiting background activity on Android
- Go to Settings > Apps
- Select an app and tap Battery
- Choose Restricted to block background activity
- Do this for apps you do not need all the time
Checking battery usage per app
Check which apps use the most power and take action.
On iPhone: Go to Settings > Battery. Here you can see which apps used the most in the last 24 hours or 10 days.
On Android: Go to Settings > Battery > Battery usage. See which apps are at the top and consider restricting or uninstalling them.
Using power saving modes
Both iPhone and Android have built-in power saving features that automatically adjust various settings to save battery.
Low Power Mode on iPhone
- Go to Settings > Battery
- Turn on Low Power Mode
- Or ask Siri: "Turn on Low Power Mode"
This mode reduces screen brightness, limits background activity and turns off automatic downloads.
Battery Saver on Android
- Go to Settings > Battery
- Tap Battery Saver and turn it on
- You can set it to turn on automatically at a certain percentage
Extreme battery saving
When your battery is very low, you can use the extreme or ultra battery saving mode. It limits your phone to essential functions only, such as calling and texting.
Limiting notifications
Every notification wakes your screen and uses power. By limiting notifications, you save not only battery but also your attention.
Managing notifications on iPhone
- Go to Settings > Notifications
- Select per app whether you want to receive notifications
- Turn off notifications for non-essential apps
- Consider Scheduled Summary for less urgent notifications
Managing notifications on Android
- Go to Settings > Apps & notifications
- Tap Notifications
- Turn off notifications for apps that are not important
- Use Do Not Disturb schedules for quiet moments
Charging: best practices
The way you charge your phone affects the lifespan of your battery in the long run.
Tips for healthy charging
- Avoid extreme temperatures: Do not charge in full sun or freezing cold
- Use original chargers: Or certified alternatives
- Do not always charge to 100%: Between 20% and 80% is optimal for lifespan
- Charging overnight: Modern phones automatically stop at 100%
- Avoid running it flat: Charge before the battery drops below 20%
Turning on optimized charging
Modern phones have features that protect battery health.
On iPhone: Go to Settings > Battery > Battery Health & Charging and turn on Optimized Battery Charging.
On Android: Go to Settings > Battery > Adaptive Charging or a similar option, depending on your device.
Frequently asked questions about saving battery
Should I close apps to save battery?
No, manually closing apps usually does not save battery and can even be counterproductive. Modern smartphones manage apps efficiently in the background. When you force close an app and open it again later, starting it up actually takes more power. Instead of constantly closing apps, limit background activity through the settings.
How long should my smartphone battery last?
An average smartphone should last a full day on a single charge with normal use. That means roughly 12 to 16 hours. With heavy use such as gaming or navigation, it can be less. If your phone lasts significantly shorter, the battery may be worn out or power hungry apps may be running.
Is it harmful to leave my phone on the charger all night?
No, modern smartphones are designed to stay on the charger all night. They automatically stop charging when they reach 100%. Some phones even have smart features that slow down charging so the battery is full exactly when you wake up. This protects battery health in the long run.
When should I have my battery replaced?
Consider replacing the battery when your phone has less than 80% of its original capacity or battery life has dropped significantly. On iPhone you can check this via Settings > Battery > Battery Health. If the maximum capacity has dropped below 80%, replacement is recommended. Most batteries stay in good shape for two to three years with normal use.
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