The culprits that cause phone batteries to drain quickly.

The reasons why your phone battery drains quickly aren't always easy to spot. In fact, many factors silently consume energy every day, from usage habits and system settings to background app activity, and most users don't pay attention to them.

Proactively identifying and controlling these "hidden culprits" not only helps extend battery life during the day, but also contributes to improved device performance and long-term battery lifespan.

Below are the most common reasons why your phone's battery drains quickly, along with some effective solutions.

1. Screen brightness is too high.

One of the most obvious battery-draining "killers" is a screen with excessive brightness. Increasing the brightness to maximum, especially when using it outdoors, is convenient but drains the battery quickly.

To improve this, you can enable automatic brightness adjustment. On most Android and iOS smartphones, this feature is located in Settings > Display or Display & Brightness. When enabled, the phone will automatically dim in low-light environments and brighten in brightly lit areas, significantly saving battery power without compromising the user experience.

Additionally, on an iPhone, you can quickly adjust the brightness manually by swiping down from the top right corner to open Control Center, and then using the brightness slider.

However, if you need high brightness for vision reasons, consider switching to dark mode. This mode doesn't reduce overall brightness but changes the interface from a light to a dark background, thereby reducing power consumption, especially effective on OLED screens.

2. Applications running in the background

Many apps continue to run even when you're not opening them, known as background apps. Apps like virtual private networks (VPNs), antivirus software, health trackers, or calendars often continuously sync data, monitor activity, or send notifications, thereby consuming significant battery power even when you're not interacting with them.

Although some background apps are necessary, many can be turned off completely to save battery power. Here's how:

- On iOS: Go to Settings > Battery and turn on Low Power Mode. This feature will temporarily limit background app activity and unnecessary effects.

- On Android: Go to Settings > Device Care, then switch to Battery Optimization or Adaptive Battery (depending on your Android version). Some devices also allow you to enable Power Saving Mode to limit background app activity.

Controlling background apps not only improves battery life but also makes the device run more smoothly and stably.

3. Picture-in-Picture Mode

If you've ever watched videos on YouTube Premium or similar apps, chances are you've used Picture-in-Picture mode. This feature allows the video to continue playing in a small frame on the screen while you simultaneously use other apps, which is incredibly convenient for multitasking.

However, running multiple apps simultaneously, especially playing videos continuously, can drain the battery faster. If you want to disable Picture-in-Picture mode for specific apps, you can do the following:

- On Android, go to Settings > Apps, and select the app you want to adjust.

- On iPhone, go to Settings > General > Picture-in-Picture, then select the corresponding app.

Here, you'll find the relevant permissions and settings. Depending on the application, you can enable or disable Picture-in-Picture mode with a simple toggle switch.

4. Keep connections enabled 24/7.

Keeping Wi-Fi or mobile data constantly on is a common habit, but it's also a major cause of rapid battery drain. When constantly connected, the device receives notifications, syncs, and updates in the background even when you're not using it, which is especially wasteful at night.

The ideal time to turn off Wi-Fi is when you go to sleep. You can turn on airplane mode to disconnect all connections. However, if you're worried about missing urgent calls, just turn off Wi-Fi and mobile data; your phone will still receive calls as usual.

- On iPhone: Swipe down from the top right corner to open Control Center, then turn off Wi-Fi and data. Or go to Settings > Wi-Fi to turn it off manually.

- On Android: Swipe down from the top to open Quick Settings, then turn off Wi-Fi or turn on airplane mode if needed.

5. Location tracking applications

Many popular apps, such as Google Maps and Uber, require location access to function. However, they don't always track your location only when you have the app open. Some silently record your location even while running in the background, which consumes significant energy and contributes to reduced battery life.

On Android, you can do this from the quick settings menu by swiping down from the top and turning off the location icon. Pressing and holding this icon will also take you to the full Location Settings section, where you can manage it in more detail.

On iPhone, go to Settings > Privacy & Security > Location Services to turn on/off or adjust access permissions for individual apps.

However, if you still want certain apps, such as maps or safety apps, to continue using location services, manage their access individually:

Go to Settings > Apps (Android) or Settings > Privacy (iOS), select the specific app, and find the Location Permissions section. Here, you can choose options such as "Only when using the app," "Always allow," or "Disallow."

Fine-tuning each app might take a little time, but in return, you'll have complete control over your privacy and a healthier battery.

6. Energy-intensive applications

Not all apps consume the same amount of energy; some apps can drain your battery significantly even when you use them infrequently. That's why you should regularly check and remove apps that are causing unusual battery drain to extend your phone's battery life.

- On iPhone: Go to Settings > Battery, then select Show Battery Usage. You'll see a list of apps sorted by battery consumption, along with specific percentages. If you find any apps unnecessary or be behaving unusually, consider uninstalling them or disabling background updates to save battery life.

- On Android: Open Settings, search for "battery usage" or go directly to the Battery section. Here, you will see the power consumption of each application. The interface may vary depending on the device, but the basic information is similar. Applications at the top of the list that you don't use often should be deleted, forced stopped, or have their background running permissions limited.

Regular checks not only save battery life but also help you detect problematic apps or those running in the background for no apparent reason early on.

7. Unnecessary notifications

Whenever you install a new app, default notifications are usually automatically enabled. While convenient, constantly receiving unnecessary notifications is not only annoying but also drains your phone's battery faster.

To control this, go to Settings > Notifications on your Android or iOS device. Here, you will see a list of all installed apps along with their notification status.

You can quickly turn off notifications for individual apps completely using a toggle switch or by tapping on each app to customize.

Filtering out unnecessary notifications not only helps your phone last longer but also allows you to focus more on what's important.

8. Malware

One of the serious but often overlooked causes of abnormal battery drain on phones is malware. This threat is particularly concerning for Android users, but no device is completely immune, including iPhones.

Malware often operates silently, monitoring activity, sending data to remote servers, or performing unwanted tasks, all of which consume system resources and battery power.

Additionally, if your phone starts running slowly, overheating, or frequently freezing, it could be a sign that you're infected with malware.

Even if you don't download suspicious files or click on random links, malicious apps can still slip through the layers of review in app stores like Google Play or the App Store. This means that no environment is truly 100% safe.

If you suspect your phone is infected with malware, do the following:

- Immediately uninstall any apps from unknown or suspicious sources.

Install reliable security software to scan for and remove malware.

- Activate Safe Mode to prevent third-party applications from running during fault diagnosis.

9. The phone battery is worn out.

Apps and settings aren't always the cause of a phone battery draining quickly. Sometimes, the condition of the battery itself is the factor that directly affects performance and lifespan.

Typically, after about 2-3 years, batteries start to degrade, no longer maintaining their original maximum capacity. This results in shorter usage times, even if you haven't changed your phone usage habits.

Some devices will warn you when the battery is degraded, but in most cases, you only realize it through increased charging frequency and unusually rapid battery drain.

The first and most effective solution is to replace the battery. This is a simple fix and much less expensive than buying a new phone. The price of a battery replacement will depend on the model you have, but it's usually quite affordable.

However, if your phone is old, experiencing more hardware issues, and repair costs are starting to rise, upgrading to a new device might be a more sensible and economical option in the long run.