Why Does Your Phone Unexpectedly Shut Off When The Battery Reach 20%?

Imagine yourself enjoying your favorite movie on Netflix or another platform when your phone suddenly alerts you with a notification. Battery Reach “20% .”

You believe 20% should be plenty to see the movie through to the end, correct? You swipe the notification, press play, and after a few minutes, your phone shuts down and your movie ends abruptly.

On smartphones, random shutdowns are an all-too-common problem, but they may be avoided.

 In this post, we’ll discuss the causes of these issues, how to avoid them, and how to use a device that can help you get the most out of your cell phone’s battery.

Why Does Your Phone Suddenly Turn Off After Reaching 20% Battery? 

1. Inaccurate Battery Percentage

Your battery’s percentage may not be 100% correct, even though you may not have given it much concern before. There isn’t a secret method to determine exactly how much of your phone’s battery is still charged. Instead, algorithms used to make a (highly accurate) measurement.
Batteries produced through chemical reactions. These reactions are measurable, like other scientific methods. Using chemistry formulas and the resulting actual interactions, your smartphone’s battery features a kind of “fuel gauge” that calculates the battery’s remaining capacity.
As you can probably guess, this is a delicate procedure that can impacted by various factors, like temperature, the age of your battery, the accuracy of the fuel gauge, and so on. While the majority of popular cellphones display accurate battery percentages, faults can happen that lower the accuracy, leading to unanticipated shutdowns.

2. Your battery is being drained too quickly

Another typical explanation for a rapid smartphone shutdown is unfavorable environmental factors. Certain factors can have an impact on both the battery itself and the accuracy of your battery percentage. One of these problems is probably to blame if the battery % is accurate but your phone’s battery is draining quickly.

The most common cause of unexpected smartphone battery failure is probably temperature. Your battery is powered by chemical reactions, as was previously mentioned. The reactions may slow down if your phone gets too cold, and your battery may suddenly switch off even if it still has 20 or 30% charge. Your phone will automatically turn off if the temperature rises to an unsafe level since the reactions could become harmful.

Your battery may be draining faster than usual due to an internal software problem. This might be malware, a background-running app like a mobile game, or even a simple software problem that needs to be fixed.

3. Your battery’s voltage will decrease as its percentage decreases.

Thirdly, your battery’s voltage may be compromising its capacity to charge your smartphone. Your battery’s voltage indicates how much power it is currently producing.

Very similar principles apply to voltage. Your phone can perform heavy tasks more smoothly when the battery is fully charged. However, around a 20% or 30% charge, things start to slow down, and the phone suggests low power mode since typical usage (such as gaming or video editing) is too much for it to manage. Your phone could die suddenly if you neglect the notification.

How to Keep Your Phone From Turning off unexpectedly at 20% or 40% charge?

1. Update Your Phone

Update the software on your phone to avoid unexpected shutdowns. Annual upgrades bring new, interesting features and emojis, but smaller updates also make really crucial changes to your phone, like enhancing security and performance.

These small updates frequently address bug-related problems like unexpected shutdowns. You can get more use out of each charge with their assistance because they can increase the accuracy of your battery percentage and lower the amount of energy needed to power processes.

2. When your phone’s battery is low, restart it

A process running in the background is one of the possible reasons for a battery that is draining quickly, as we indicated in Point 2 above. This might be a game you forgot to end, malware, an app looking for Bluetooth or using your location, etc.

All of these operations consume a lot of power, which may cause your phone to randomly shut off. When the battery gets near 20%, you can reset your phone to avoid this from happening.

The only safe way to end all active processes on your phone is to restart it. All of your currently active applications should be closed before it begins. Your battery life will increase as a result, and there will be less possibility that your phone will die when you least expect it.

3. As Soon As Your Phone’s Battery Runs Low, Charge It

Of course, this is the most straightforward and efficient solution for a phone that unexpectedly dies, and it’s the only method that is sure to work. In addition to allowing your phone to run on external power and warming up the battery to combat the cold, plugging it into a charger also stops your phone from losing power due to a low battery.

Even though this is a sure solution, a wall outlet might not always be nearby. This is the reason why so many individuals now carry a wireless charger with them everywhere they go. You don’t need to be concerned about your phone dying as much because it gives you enough extra charge.

QROV: The Magnetic Wireless Car Charger That Keeps Your Phone Alive

You can use QROV to get the extra power you need to prevent unexpected phone failures. Your phone gets power from a MagSafe car mount charger. When you need to charge it, all you have to do is place it on the QROV wireless charger, and it will begin charging right away.

Additionally, no case needs to removed from your device in order for it to fit into the mount or charge – all you have to do is place your phone on the mount. After being set up once, you can easily insert and remove your phone one-handed without hassle every time.


It is stressful and frustrating when a phone dies. You may significantly lower the risk of your smartphone dying unexpectedly by using the methods we’ve discussed above and the QROV wireless charger.



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