How much slower is an iPhone with an old battery?


Back in iOS 10.2.1, Apple secretly added a controversial battery management feature. It was implemented to deliberately slow down your iPhone in case it had an old battery, preventing sudden shutdowns in the process. However, the feature was not publicly announced, and users were not happy when they finally discovered its existence in December last year.

The option to disable the feature will come once iOS 11.3 goes live and in the meantime, YouTube user Bennett Sorbo has decided to show us exactly how much Apple slows down our old iPhones.

The test includes an iPhone 6s, which undergoes a series of tasks, first with an old (left) and then with a fresh new battery (right). The tasks included browsing the web, watching videos in YouTube, and entering a bunch of apps, finishing off with a GeekBench test. You can probably guess the results by yourself –  the iPhone was faster after getting the battery job, finishing the test in 4:33 minutes – a 62 second improvement over the pre-battery replacement time (5:35 minutes). The following GeekBench tests also showed a difference in CPU scores:


As you can see, the difference between having an iPhone with a new and one with an old battery is quite significant. Luckily, if you feel the throttling taking over your iPhone, you can get your battery replaced for only 30 bucks by Apple or any other authorized service provider.

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82 Comments

1. Furkan

Posts: 552; Member since: Feb 25, 2017

just WoW

53. sgodsell

Posts: 7456; Member since: Mar 16, 2013

No wonder why Apple is getting sued all over the world. Even the governments around the world are getting involved. People need to try out other platforms. Instead of laying out tons of money on their low spec iPhones.

54. PhoenixFirebird

Posts: 125; Member since: Oct 10, 2016

But most people in my university, for instance, use iOS and so I cannot move out of it.

2. NarutoKage14

Posts: 1327; Member since: Aug 31, 2016

Apple deliberately "broke" customers iPhones and the only currently viable fix is by paying Apple. Sounds like Ransomware to me.

23. rouyal

Posts: 1583; Member since: Jan 05, 2018

$30 for a new battery, installed, probably seems like a lot to a typical android user. I mean, you can buy a whole new android phone for that price, right?

27. TechSceptic

Posts: 1156; Member since: Feb 05, 2018

You're paying Apple to repair a defect that Apple is responsible for creating. You really don't see the issue? Do you have no self-respect? Stand up for yourself as a consumer, not Apple. They don't care about you, clearly.

30. rouyal

Posts: 1583; Member since: Jan 05, 2018

Paying $30 to replace a battery of a phone released in 2015 (you do know the typical lifespan of a li-ion cell, right?), to get the 6s faster than the galaxy s8, seems the cheaper way to go. But android users like to step over a dollar to save a dime. If Apple having the best customer service, and updates their phones years past what anything android offers, means Apple doesn’t care, what does that say about any android manufacturer?

56. iushnt

Posts: 3126; Member since: Feb 06, 2013

You are trying a lot harder to defend Apple. While, I don’t blame Apple for battery defradation, however, they should have been transparent about this. Many user would have simply replaced their battery than replacing their whole phone.

78. VZWuser76

Posts: 4974; Member since: Mar 04, 2010

Those are some broad generalizations you're making there, essentially rehashing the same tired insult that's been around since I started on PA. "You're just jealous of iPhone users because you can't afford one". Sorry, but that's not an issue for me. But I would rather buy a new device than putting out money to keep old tech going. Unless it's something rare, I don't see the point. Between the added features, updated hardware, and included software support, the extra money for a new device makes more sense IMO. I don't use iPhones because I won't support Apple as a company, due to my experiences with them as a customer in the past. And I prefer the variety of hardware afforded to me in the Android community.

39. theviolinist

Posts: 209; Member since: Feb 03, 2018

So Apple is responsible for the ageing of a li-ion battery? You have no idea what you're talking about.

41. DFranch

Posts: 557; Member since: Apr 20, 2012

My understanding of the issue is it isn't about $30 to replace a battery. That's actually a good price to replace the battery on a sealed device. The issue is Apple has been lying about slowing their phones down for years. Claims of apple devices slowing down over time have been around for quite some time. Apple has actively disputed this in the past.

49. c.m.s

Posts: 239; Member since: Dec 10, 2017

Perhaps you should read up on the subject. This patch that slowed the CPU down when the battery no longer manage to handle peaks without risk of shutting down was release last year with patch 10.2.1. And people who thinks this is not happening to android phones are just need to learn how to use google. It's happening to every manufacturer. Just because it has not happen to "you" does not mean its not happening. Phones slowing down because the hardware no longer can keep up with the software is a completely different thing and hardly something unique for phones.

44. rouyal

Posts: 1583; Member since: Jan 05, 2018

Please, try to respond with logic, not hurt feelings.

72. xfire99

Posts: 1206; Member since: Mar 14, 2012

You have no idea what its all about either. Its not about the battery aging and its about CPU throttling. Which others phones throttles the CPU if the battery is bad or losing capacity? Beside, Why bringing this up again? This is old news and more interest will be about all the mass action law suing. Havent heard any about over 50 mass action laws in US and alot others around the World? Especially in France which can cause jailtime. Havent heard any oh those suings?

80. theviolinist

Posts: 209; Member since: Feb 03, 2018

You're right, others just explode. It's sad you think you're smart.

83. xfire99

Posts: 1206; Member since: Mar 14, 2012

No, its just u are dumb. Its about cpu throttling and you bringing about battery aging and exploding? What the heck does it have do do with this?

3. NateDiaz

Posts: 1090; Member since: Mar 03, 2018

My iPhone 7's scores reduced to almost half with the current 11.2.5 update. Waiting for 11.3 so I can turn off this throttling thing.

4. TechSceptic

Posts: 1156; Member since: Feb 05, 2018

I'm very glad that i have an android phone, as i would hate to see this happen to my phone, especially considering that Apple knew that this was an issue. Even though they knew it was an issue they didn't tell their consumers until they were caught, and then they had the audacity to say that in order to fix the issue that they created, you have to pay them. I would be outraged, if the brand i trusted did this to me as a consumer. I don't know how Apple fans aren't outraged at Apple, they should be.

5. kiko007

Posts: 7518; Member since: Feb 17, 2016

Your Android phone will likely slowdown with or without a protocol like this in place. And no... I'm not bashing Android. That's just the reality of how the platform collects garbage data overtime. Having said that, at least you guys get to clean it up with a restore.

8. ShadowSnypa786

Posts: 595; Member since: Jan 06, 2017

Not on google pixels or huaweis with their machine learning. You can always wipe cache and its fine.

9. maherk

Posts: 6966; Member since: Feb 10, 2012

Cache cleaning does the trick for me, plus setting my phone to automatically restart once a week at 3am. If you just clean your cache regularly, you'll never see your phone slowing down.

11. kiko007

Posts: 7518; Member since: Feb 17, 2016

Does the automatic restart thing really help? Never tried that before.

16. maherk

Posts: 6966; Member since: Feb 10, 2012

It does. I had the S8, S8+, and Note 8 during last year, and I never had my phone slowing down on me. Every phone that I set up for my family members has the device maintenance widget on the home screen, because cleaning cache regularly makes a huge difference.

15. TechSceptic

Posts: 1156; Member since: Feb 05, 2018

No, they wouldn't. The people who caught Apple doing this, went onto the android platform to see if they could find proof of the same thing happening on android smartphones. Guess what? They found absolutely nothing that indicated that android phones were being throttled, unlike the iphones. They couldn't find a single shred of evidence of it happening. You can deflect as much as you want, but that's the facts. Lastly, if this was happening on android, then people would have noticed almost instantly, as people on the android platform are generally much more tech savvy and typically dive much deeper into their phones, such as installing completely different ROMs and such.

50. c.m.s

Posts: 239; Member since: Dec 10, 2017

No, they are not being slowed down but they shutdown just like iPhones when the battery health is bad. A simple google search and you find tons of example of this from every manufacturer. And people on the android platform are generally much more tech savvy?... please. With an 80+% global marketshare, especially in countries with low-income (since most Android that are being sold are really cheap ones) I guarantee you that the general Android user is not "much more tech savvy" than the average iPhone user. People installing custom ROMs on their phones are an extreme minority of all those 80% global share. Your choice of phone has very little to do with how interest in tech you are. I'm a system developer with great interest in hardware especially mobile SoC, yet I use an iPhone as my private phone. There might be alot more Android fans hanging around this site but it hardly makes you "tech savvy" ;)

52. VZWuser76

Posts: 4974; Member since: Mar 04, 2010

I don't get how you can correlate low-income to how tech savvy someone is. Being tech savvy has less to do with what/how much you own, and more to do with how you think. Even education isn't a decisive determining factor.

60. c.m.s

Posts: 239; Member since: Dec 10, 2017

Well I do not agree but that is for another discussion. Its not the point here, I guarantee the overwhelming number people of those 80% does not have a clue what "installing a ROM" means (and that goes for the iOS users as well). The average smartphone user, no matter what OS they are running could not care less. That the average Android user is more interested in tech than a iOS is pure BS.

62. Marcwand3l

Posts: 446; Member since: May 08, 2017

Well c.m.s it looks like you are not very smart.

69. c.m.s

Posts: 239; Member since: Dec 10, 2017

Wow, such brilliant argumentation skill...

75. Marcwand3l

Posts: 446; Member since: May 08, 2017

LoL c.m.s pass the salt, you have too much.

* Some comments have been hidden, because they don't meet the discussions rules.

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