Is It Bad To Charge Your Phone Overnight?


Should you charge your phone overnight? I will thoroughly answer that question in this blog post. If you have a phone, it’s important for you to learn the best practices for charging your phone.

Is It Bad To Charge Your Phone Overnight?

Is It Bad To Charge Your Phone Overnight?


Yes, overnight charging is bad because it will negatively affect the charging cycles and it will shorten the lifespan of the battery.


Do Not Overcharge Your Phone:


Do Not Overcharge Your Phone

Overnight charging is bad because it leads to overcharging, for optimal performance you should only charge your battery to 75% capacity, not 100%.


We’ve all heard the warning “do not overcharge your phone” and you should unplug it immediately after it charges.


It’s bad to overcharge your phone, I will give you more reasons as to why you should not do it.


Reasons Why You Should Not Overcharge Your Phone:


Reasons Why You Should Not Overcharge Your Phone

All cell phones contain a rechargeable lithium-ion battery. A lithium-ion battery charges at a faster pace in comparison to traditional rechargeable batteries.


Thus the reason why you can charge your Android phone or iPhone in a relatively short period of time.


However, a charge on some phones lasts longer than other phones but nevertheless many people are unhappy with the battery lives on their phones.


The main reason for this is the fact that many of the new phones on the market have relatively big display screens and small batteries.


Part of the problem is the way in which we use our phones today. Smartphone users are constantly listening to music, checking emails, texting, watching videos, playing video games, talking, and using apps.


Even though our phones have become more efficient within the past few years. These types of activities have a tendency to consume your battery’s resources within a shorter period of time than expected.


As a result of this, many people charge their phones overnight because it’s extremely convenient to do so.


After a full night of charging your phone will be at 100% capacity when you awaken in the morning.


However, you should think about the negative effects of doing this. Short charging cycles are better for lithium-ion batteries and it’s pointless to leave your phone charging for longer than it has to.


The Negative Effects Of Overcharging Your Battery:



Your phone’s battery stops drawing current from the charger when it reaches 100% capacity, according to Cadex marketing communications manager John Bradshaw.


Even though the charger stops drawing current when your phone reaches 100% capacity the charger will still continue to top off the charge throughout the night, says Bradshaw.


This is known as a trickle charge, this occurs in an attempt to keep the battery at 100% capacity in an effort to compensate for the small amount of charge that the phone loses on its own as time goes by.


As a result of this, your phone is constantly going from a full charge to a little below a full charge.


These trickle charge cycles will result in higher ambient temperatures for your phone (overheating) this reduces battery capacity over time and shortens the lifespan of the battery.


An article from Cadex’s Battery University states “Li-ion does not need to be fully charged as is the case with lead acid, nor is it desirable to do so.” “In fact, it is better not to fully charge because a high voltage stresses the battery.”


From the moment a cell phone battery is used it starts to decay. This results in a gradual loss of the battery’s capacity or its ability to hold a charge.


Thus the reason why people who have had the same phone for over two years will notice that the battery loses its charge at a faster pace than it did when the phone was new.


Charging the battery does not help, for iPhone users, there’s an Apple webpage in which Apple states that the battery capacity diminishes after a certain amount of charges, and the li-on battery capacity diminishes a little with each charge cycle.


When you charge your phone overnight, you’re increasing the amount of time your phone spends with the charger, this deteriorates its capacity at a faster rate.


Hatem Zeine who is a developer of wireless charging technology and the founder of Ossia states “If you think about it, charging your phone while you’re sleeping results in the phone being on the charger for 3-4 months a year,”.


“So even though the manufacturers try their best to cover this scenario, this process inevitably lowers the capacity of your phone’s battery.”


Best Practices For Charging Your Phone:


Best Practices For Charging Your Phone

You should not wait until your phone reaches close to 0% battery capacity to charge it. Full discharges negatively affect the lifespan of the battery so you should avoid doing this.


For li-on batteries, partial discharges are better, it’s best to keep your phone between 45% to 75% capacity, try to avoid charging it to 100% capacity.


This will help to maximize the capacity of the battery as it ages. You should also try to keep your phone as cool as possible because the higher temperatures accelerate the deterioration of the battery capacity.


If your phone starts getting hot while it’s charging, you should remove the phone case. This may be a bit of a hassle but it will help to keep the phone cool while it’s charging.


Now you know the best practices for charging your phone. If you plan on holding on to your phone for a while, you should avoid charging it overnight.


If you have any comments or questions about any of this information, please feel free to share them in the comment section below.



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