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Why Does My Phone Battery Drain Overnight?

As an owner of a smartphone, I’ve been frustrated by the rapid battery drain overnight. I’ve done some research and testing to try to figure out why this is happening and I’m here to share what I’ve discovered.

In this blog post, I’ll explain why your phone battery may be draining overnight and provide some solutions you can try to prevent it from happening.

The usual reason is that your battery needs to be replaced soon. Some settings can force your phone to use up more power. A weak signal may also make your device burn through its resources as it looks for better reception. 

While there are issues that can be more technical, you can easily work on the more common reasons why your battery runs out of power even while charging.

Learn how to deal with the usual suspects why your phone’s battery drains overnight.

Screen Timeout Setting Too LongThe longer the display stays lit, the more power it uses.Enable auto-brightness, set screen timeout to 30 seconds or 1 minute, and ensure the display is turned off before sleeping.
Too Many Background AppsHaving too many apps running in the background will drain your battery.Check which apps are running in the background and close those you’re not using.
Excessive Alerts and Push NotificationsThe continuous blinking from receiving too many notifications drains the battery.Go to your settings and choose the push notifications and alerts you want to keep, disabling the rest.
Outdated Operating SystemOlder versions of operating systems may cause apps to consume more resources.Update your smartphone’s operating system regularly to minimize battery consumption and improve efficiency.
Poor Phone ServiceSearching for a strong signal (Wi-Fi or cellular) can drain your battery quickly.Enable Airplane Mode to prevent your device from using power when searching for a good signal.
Virus or Rogue AppViruses and rogue apps can cause unnecessary functions and processes, contributing to battery drain.Stick to trusted sources for apps, and use reliable security software to protect your device.
Battery Nearing End of LifespanLithium-ion batteries degrade over time and will eventually need to be replaced.Get a genuine battery replacement when your battery is nearing the end of its lifespan.

Why Does My Phone Battery Mysteriously Drain Overnight?

Here are some reasons behind this problem, as well as quick fixes that you may consider:

The Screen Timeout Setting Is Too Long

Adjusting the smartphone’s screen timeout is another setting that’s overlooked. Obviously, the longer the display stays lit, the more power it uses. 

A good way to fix this is to enable auto-brightness. This setting automatically increases or decreases your screen’s brightness. Other than that, you can always set your screen to dim and save a little bit more power. 

So, for people who are used to tinkering with their phones before sleeping, make sure that the display is turned off when you’re about to shut your eyes.  

Alternatively, you can just set your screen timeout to an ample length, like 30 seconds to a minute. 

A Lot of Apps Are Running in the Background

Mobile devices today are built to handle multiple applications simultaneously. Having a few apps in the background won’t drain your device’s battery but having too many running most certainly will.

Mobile apps may have multiple windows that can consume resources. If these apps come from unreliable sources, they may consume more memory and battery power than expected.

Fortunately, there are ways for you to check which apps are running in the background and lessen them accordingly. You can also make an effort to close the apps you’re no longer using.

Too Many Alerts and Push Notifications

Alerts and notifications are really useful if you’re the type who enjoys updates about everything. Getting a few notifications is okay, but too many will affect your mobile device’s power.

It’s not the activation that drains the battery but the endless blinking due to receiving so many notifications. 

Thus, if you want to save more battery power, go to your settings and carefully choose the push notifications and alerts you want to keep. Disable the rest, and your smartphone’s battery can last a little longer. 

The Operating System is Outdated

Operating systems are responsible for running your mobile phone’s functions and applications.  

If your phone is running an older version of its operating system, then the apps may be consuming more resources. 

Update your smartphone’s operating system regularly to minimize its battery consumption and allow it to function efficiently.  

The Phone Doesn’t Have Service

One of the more crucial functions that can drain your mobile device’s battery is when it’s searching for a strong signal. This can either be a Wi-Fi connection or cellular coverage.

If your battery drains quickly, you may want to check out the reception in your room. Finding out the strength of the signal can help determine if it’s causing your phone’s battery to lose charge faster.

One of the solutions is to enable your phone’s Airplane Mode. It prevents your device from using power when searching for good reception. 

Your Phone Has a Virus or Rogue App 

Though a virus doesn’t drain the battery directly, it can cause the phone to use up more power by affecting apps and its system. 

Similarly, rogue apps can prompt unnecessary functions and processes, contributing to battery drain.

The best way around this is to stick to sites that are trusted. You’re not only extending your phone’s battery life, but you are also protecting your device’s operating system from harmful apps.

The Battery Is at the Brink of Its Lifespan

Read more: Why does my iPhone say SSL error?

Lithium-ion batteries will eventually degrade and will need to be replaced.

When your battery nears its last few charge cycles, it will seem like it loses power faster. The only way to deal with this battery issue is to get a genuine replacement.


Read more: Why does transferring data to a new iPhone take so long?

If you’re one of the many mobile phone users who experience this kind of hassle, remember to check the simple issues one by one and resolve them accordingly. 

There’s a way to fix most of these problems as long as they’re not too technical. If you can’t handle the issue, you can always visit a service center near you to have your mobile phone checked.