How and why to disable fast charging on your phone

How and why to disable fast charging on your phone
Fast charging is one of the more interesting mobile tech innovations of the last few years. The technology, which was introduced under the "Quick Charge" moniker by Qualcomm back in 2013, has evolved and is currently used in various different forms by most of the big phone makers. 

The advantage of fast charging is pretty obvious - in our fast-paced world, the ability to get your smartphone fully recharged in an hour or less can be quite beneficial. However, this "less time in the socket, more time in the pocket" approach does come with a couple of drawbacks that aren't that apparent to the average user.  

Why would you want to disable fast charging in the first place?


Let's start by explaining how fast charging works. Until recently, manufacturers produced chargers that didn't allow too much current flow into your phone or tablet. This was done to prevent the potential risk of battery damage which could render your devices useless or, in rare cases, even make them a fire hazard. 

Although fast charging delivers an increased limit of voltage or amperage to allow for smaller charging times, the technology won't cause any sudden or major damage to your phone. Still, fast charging your device all the time isn't beneficial in the long run. 

First off, the Lithium-Ion (Li-Ion) battery inside your phone will degrade faster if you're always supercharging it. This especially important for those of you planning to use your daily driver for more than 18-24 months. 

Then, there's always the issue of overheating. As fast charging puts a lot of power into your device in a decreased time window, there are certain instances where this could lead to hardware damage. You shouldn't expect anything bad to happen if you leave your phone to recharge in a cool, air-conditioned place. However, imagine doing this while running an intensive game or app, or while you're in a hotter environment. 

Besides, most of the times we leave our phones to charge overnight, so what difference would it make if the battery gets to 100% two hours quicker than usual while you're sleeping? If you are keen on preserving the longevity of your gadget, let's check out how we could disable fast charging when it's not needed. 

 Solution #1: Check your phone's settings



The most hassle-free method of disabling fast charging is from the Settings menu. Some manufacturers have a toggle to enable or disable the feature. These can most often be found in the Battery subsection of settings. 

If you have a Samsung phone, for example, you need to head over to Settings -> Device Maintenance -> Battery. Then, tap the 3-dot menu at the top right, click on Advanced Settings, and you should see toggles for fast cable and wireless charging. In other cases, you could try using the search bar in settings for looking up "fast charging", "quick charge", or something similar. 

If there are no options to disable fast charging from within your phone, fret not! As they say - "there's more than one way to skin a cat".

Solution #2: Dig up that old regular charger



If you have a regular charger from an older device lying around, just make sure to have it nearby for the times you top up your phone overnight. Of course, you also have to make sure that your cable is USB-C to standard USB to be compatible. Otherwise, you might have to buy one online, but these usually cost between $5-$8, so it might be a worthy investment. 

Wondering if your old charger has fast charging? Well, usually you should see "quick charge", "fast charge", "dash charge", or "adaptive fast charging" plainly written on such items, so if these terms are omitted, it's a pretty safe bet that you have a regular charger. Still, just to make sure, you can have a closer look by looking at the voltage and amperage - generally, everything that's at or below 5 volts and 2 amps is considered standard charging. 

Solution #3: Use your laptop, PC, or console



Alternatively, you can plug your phone to any gadget capable of charging it through USB ports. Again, the only thing that's required here is a compatible cable and you're good to go. A laptop, desktop computer, Xbox, or PlayStation are perfect candidates for the task, as they don't generally feature any high-power ports. 

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37 Comments

1. perry1234

Posts: 643; Member since: Aug 14, 2012

I don't think the cons apply to Dash/Warp charging , where all the heat generation takes place outside the device ? Or do they?

11. may_czos

Posts: 955; Member since: Nov 22, 2014

Some if them do. Heat generated by the voltage conversion may be located at the charger but there's still a very intense chemical reaction happening inside the battery and it generates some heat.

15. androiduser

Posts: 510; Member since: Jun 18, 2014

I can't wait for graphene batteries, I think phones will start having them in 2021

2. alanrock

Posts: 303; Member since: Oct 04, 2018

coming soon...how to disable FHD screen and enjoy in low res and why...

14. androiduser

Posts: 510; Member since: Jun 18, 2014

I changed the resolution on my s6 edge to fhd and it still looks just as good if not better while also improving the phones performance, as for the battery there was a very small improvement if any at all

19. Usernameisnotsowitty

Posts: 36; Member since: Oct 08, 2018

So that they can match iphones...

3. alanrock

Posts: 303; Member since: Oct 04, 2018

double trouble...

4. rouyal

Posts: 1573; Member since: Jan 05, 2018

Solution #2 is what I use. If it comes with a fast charging brick, I don’t even unpack it. I don’t have problems with battery life, so no need to take chances on fast charging. Been using my iPhone 8 daily for about a year, and battery health is reporting at 99%. Always charged with the ‘slow’ charger it came with.

5. PhilM

Posts: 4; Member since: Dec 17, 2018

I don't actually see any facts in this article. Do you have official documents showing that fast charging reduces battery longevity or are you just claiming that out of your...? In fact, I'd be curious to see what's more damaging: fast charging or leaving your phone plugged in all night. From what I read, leaving it plugged in at 100% all night can be very detrimental to a battery. I've actually made a point of never charging at night so I can actually remove it when it reaches around 95%. Quick charge helps with that (currently owner of a mate 20 pro)

7. piyath

Posts: 2445; Member since: Mar 23, 2012

1) Fast charging very often will definitely deteriorate your smartphone's battery over time. 2) Fast charging generates lots of heat and thus may end up damaging you , your phones inner hardware or your surrounding. Facts.......

13. PhilM

Posts: 4; Member since: Dec 17, 2018

Right, now that you say so as well, it must be true! Point to actual technical documents... Yeah the note 7 exploded but that's got nothing to do with the actual fast Charing. Even some older iPhones caught on fire and we all know how slow their harger is!

24. Leo_MC

Posts: 7237; Member since: Dec 02, 2011

If you are ready to pay me 20.000€, I will provide you with the documents. Should I give you my account no?

25. speedingcheetah

Posts: 81; Member since: Jul 22, 2017

Exactly. Is is one of those topics that folks will argue under the table about. One side produces "facts" the other same. In reality, if you read the actual statements by the manufactures of fast charging etc, educate yourself in how the tech works...then you will know. The fast part of the charge, where it is higher current etc is only when the battery is below a certain level charge ~40% i think? Once it reaches the higher state of charge, the voltage and amps lower and charging becomes slower until it stops at 100%, then is on trickle. Modern phones and used with properly designed, OEM or good quality after-market certified chargers and cables, (not some cheapo knock off) there is no risk or long term damage done to the battery by leaving it on charger overnight. There was a very good articles on this topic.... https://www.ipitaka.com/blogs/news/does-wireless-charging-affect-the-life-of-your-smart-phone-battery-the-answer-is-no https://www.digitaltrends.com/mobile/does-wireless-charging-degrade-your-battery-faster/

30. sgtdisturbed47

Posts: 966; Member since: Feb 02, 2012

After 8 years of iPhone repairs, I can say for sure that leaving it plugged in all night can and will trash a battery over time, in some cases causing the sudden and sometime screen shattering ballooning.

33. speedingcheetah

Posts: 81; Member since: Jul 22, 2017

Well that apple in general. Same goes for thier macbooks, but those have an added feature of swelling so big they pop up the touchpad and even split open the case quite often. Those are scary to open and repair.

37. Plutonium239

Posts: 1200; Member since: Mar 17, 2015

Leaving your phone plugged in does not harm a lithium ion battery because lithium ion batteries do not have a memory effect. The life cycle of a lithium ion battery is determined based on the number of full cycles the battery go's through. One cycle is from 100% charge down to 0% and back up to 100%. Fast charging does not negatively impact the battery life if the manufacturer specifically designed the battery to rapid charge.

6. piyath

Posts: 2445; Member since: Mar 23, 2012

This is a very good article. We shouldn't over hype this fast charging craziness too much because it is not good for our phones and very dangerous for our lives. Also the battery lives of present smartphones are generally pretty good and they last for a full working day anyway. So why fast charge over night when you have all night to charge your phone?

17. TheOracle1

Posts: 2221; Member since: May 04, 2015

Says an iPhone user......

28. andrewc31394

Posts: 290; Member since: Jun 23, 2012

for alot of people phones don't last a full working day at this point in time. myself included. the only exceptions would be the P20 Pro, OnePlus 6T, etc.

31. sgtdisturbed47

Posts: 966; Member since: Feb 02, 2012

iPhone 7 Plus and 6S Plus both last me 2 working days.

34. speedingcheetah

Posts: 81; Member since: Jul 22, 2017

Both my 2yr old Pixel XL still gets me 2 days battery life with moderate use. Infact, since the Oreo update, the phone lasts longer and run much smoother than when i first got i with 7.1.2, even 2 yrs later. My new Pixel 3 gets 2.7 days easy with the same usage. All other phones i have ever had, LG, Samsung, all the top end popular models, never had such great battery life, and they all required a new battery just after the 1.5 yr mark. And the models with removable batteries, even getting a new OEM, they never lasted as long as the original. As far as battery life and longevity does, Google got it right!

8. STRANG3R

Posts: 234; Member since: Sep 24, 2015

This article is for giving motivation isheeps who paid $1000 and they didn't even get fast charger in the box.

16. TheOracle1

Posts: 2221; Member since: May 04, 2015

You beat me to it. I'm waiting for the i6 to praise Apple for not including a fast charger.

9. TheOracle1

Posts: 2221; Member since: May 04, 2015

I always understood that fast charging was a controlled three stage process. On my previous Mix2 it was fast below about 65%, regular up to about 95% and slow/trickle thereafter. Keeping it on the charger overnight doesn't do any damage from what I've read as newer phones and chargers regulate it correctly.

20. Usernameisnotsowitty

Posts: 36; Member since: Oct 08, 2018

If I'm not mistaken, Sony also does similar things...

10. Be_Mine

Posts: 243; Member since: Dec 29, 2013

Option #3: Use Apple stock charger.

18. japkoslav

Posts: 1500; Member since: Feb 19, 2017

Or even better - use USB 1.0 to charge your phone ...

21. worldpeace

Posts: 3129; Member since: Apr 15, 2016

Or use microwave..

12. may_czos

Posts: 955; Member since: Nov 22, 2014

Unfortunately Huawei doesn't allow users to disable fast charging.

22. matistight

Posts: 982; Member since: May 13, 2009

Li-ion batteries have a life span of 300-500 charge cycles. 1 charge a day is 1 charge cycle. If you want to keep your phone for the "18-24 months" you should stop worrying about how you charge the phone, but rather how to replace the $10-$20 battery inside that phone. Clearly this article was made by someone who's battery failed, requiring them to "buy a new phone" when they could have just changed the battery. Also saying use a slow charging but recommending a $5-$8 charger is terrible because you don't know what that entails, or if it is a certified charger or some cheap aftermarket brick that'll ruin your phone. There's no mentions of wireless charging either. As for "overheating" that's not true. Your charger slows down once it hits 90%. Sure there may be some heat, but that's not "overheating", thats maybe 100 degrees F. Also, most phones do not allow fast charging to be activated while the screen is on... Also if you want to talk about degrading the battery, you should talk about how charging to 80% is the best way to keep your battery going for 18-24 months. It is a terrible way to live but it's the best way to keep the battery going. TL;DR. I am critisizing the author, charging to 80% is the best way to keep the battery going but I think it's dumb, and learn how to change your battery yourself.

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