Apple Addresses Alleged Throttling of iPhones With Degraded Batteries

Over the course of the last week, there's been speculation that Apple is throttling the performance of older iPhones with degraded batteries, leading to resurgence of accusations that Apple is deliberately slowing down older iPhones that aren't operating at peak battery performance.

In a statement to TechCrunch on the results people are seeing when testing iPhones with older batteries, Apple says it is aiming to smooth out the high power draw peaks that can result in shutdowns and other problems in older devices to "deliver the best experience for customers."

iphone 6s colors
Lithium-ion batteries degrade over time by nature, and there's nothing Apple can do to halt the process, so it uses power management techniques to attempt to prolong the life of the iPhone and its battery. Apple isn't denying that iPhones with older batteries can sometimes see slower performance, but power management is not a feature that's been implemented to force users to upgrade by deliberately slowing devices.

"Our goal is to deliver the best experience for customers, which includes overall performance and prolonging the life of their devices. Lithium-ion batteries become less capable of supplying peak current demands when in cold conditions, have a low battery charge or as they age over time, which can result in the device unexpectedly shutting down to protect its electronic components.

Last year we released a feature for iPhone 6, iPhone 6s and iPhone SE to smooth out the instantaneous peaks only when needed to prevent the device from unexpectedly shutting down during these conditions. We've now extended that feature to iPhone 7 with iOS 11.2, and plan to add support for other products in the future."

The throttling accusations first surfaced last week, after a Redditor shared Geekbench results taken before and after the battery in his iPhone 6s was replaced. He claimed that performance on his iPhone 6s sped up drastically after replacing a battery with a wear level "around 20%."

Then, earlier this week, Primate Labs founder John Poole showed some aggregate Geekbench data that visualized a link between lower processor performance and degraded battery health. He compared iPhone 6s scores between iOS 10.2 and iOS 10.2.1, which showed variations in benchmarking scores following the update.

iphone 6s geekbench scores
Apple in iOS 10.2.1 introduced an update designed to fix a bug that was causing iPhone 6s models to shut down unexpectedly, a problem attributed to uneven power delivery from older batteries. Apple says this feature has been implemented for iPhone 6, 6 Plus, 6s, 6s Plus, SE, and, as of iOS 11.2, the iPhone 7 and 7 Plus. It will be implemented in future iPhones going forward, too.

It's this power management feature causing the benchmark variations John Poole found in Geekbench scores between iOS 10 updates last year. As explained by TechCrunch's Matthew Panzarino:

Basically, iPhones were hitting peaks of processor power that the battery was unable to power and the phones were shutting off. Apple then added power management to all iPhones at the time that would 'smooth out' those peaks by either capping the power available from the battery or by spreading power requests over several cycles.

When an iPhone's battery ages, there may come a point when it can't provide the processor with enough power to reach a peak of power, and thus it spreads the requests out "over a few cycles," resulting in the peaks and perceived lower scores on benchmarking tests. As Panzarino points out, benchmarking tests are not reflective of real world usage and will artificially trigger the power management features in the iPhone.

"In other words, you're always going to be triggering this when you run a benchmark, but you definitely will not always trigger this effect when you're using your iPhone like normal," writes Panzarino.

Apple has clear battery replacement guidelines in place. The iPhone battery is designed to retain 80% of its original capacity at 500 complete charge cycles. A defective battery that does not meet those parameters can be replaced for free for customers who have AppleCare+ or who have devices still under warranty.

For out of warranty customers, Apple offers a battery replacement service, with the company charging $79 for a battery replacement plus $6.95 in shipping.

Apple's iPhones do send out a notification when a battery has degraded enough that it's going to impact performance, but it is "pretty conservative" according to Panzarino, and he recommends Apple make this notice more aggressive, in addition to providing customers with clearer information on the link between battery life and performance.

Popular Stories

Apple Vision Pro 2 Feature 2

Apple Reportedly Suspends Work on Vision Pro 2

Tuesday June 18, 2024 8:17 am PDT by
Apple has suspended work on the second-generation Vision Pro headset to singularly focus on a cheaper model, The Information reports. Apple was widely believed to have plans to divide its Vision product line into two models, with one "Pro" model and one lower-cost standard model. The company is said to have been deprioritizing the next Vision Pro headset over the past year, gradually...
Apple WWDC24 Apple Intelligence hero 240610

Apple Explains iPhone 15 Pro Requirement for Apple Intelligence

Wednesday June 19, 2024 4:48 am PDT by
With iOS 18, iPadOS 18, and macOS Sequoia, Apple is introducing a new personalized AI experience called Apple Intelligence that uses on-device, generative large-language models to enhance the user experience across iPhone, iPad, and Mac. These new AI features require Apple's latest iPhone 15 Pro and iPhone 15 Pro Max models to work, while only Macs and iPads with M1 or later chips will...
M4 Real Feature Red

M4 MacBook Pro Models Expected to Launch in Late 2024

Tuesday June 18, 2024 10:50 am PDT by
MacBook Pro models with an M4 chip are expected to launch in the fourth quarter of 2024, according to display analyst Ross Young. In a tweet for subscribers, Young said that panel shipments for new 14-inch and 16-inch MacBook Pro models are set to begin in the third quarter of 2024, which suggests a launch toward the end of the year. Apple started its M4 chip refresh in May with the launch...
2022 back to school apple feature

Apple's 2024 Back to School Sale Launching This Week

Monday June 17, 2024 12:27 pm PDT by
Apple will launch its annual Back to School promotion for university students in the United States and Canada this week, according to Bloomberg's Mark Gurman. Apple's back to school sales provide students with a free Apple gift card when purchasing a Mac or an iPad, and this year's promotion could help Apple push the new M2 iPad Air and M4 iPad Pro models. Last year, Apple offered U.S....
iOS 18 Calendar Feature

iOS 18: Calendar App Design Changes and Reminders Integration

Tuesday June 18, 2024 6:16 am PDT by
Apple in iOS 18 has given the Calendar app a major update, adding some welcome interface design changes, not to mention long-awaited integration with Reminders. In the month-by-month calendar view, the month now appears in large bold font in the top left, while the Events list toggle has been replaced by a new button that lets you choose between Compact, Stacked, Details, and List views. ...
watchOS 11 Thumb 2 1

watchOS 11 Supports Automatic Nap Detection

Monday June 17, 2024 4:05 pm PDT by
watchOS 11 appears to include a new feature that allows an Apple Watch to automatically detect and record when you're taking a nap. As shared on Reddit, an Apple Watch owner took a nap and was able to see the sleep data recorded in the Health app, despite not putting the device in Sleep Mode. Right now, the Apple Watch only tracks and records sleep when it is in Sleep Mode, and there is no...

Top Rated Comments

riahi Avatar
85 months ago
The part about "Apple offers battery replacement in stores" is not really true. I've gone twice to an Apple store to have them assess my battery. They refused to let me pay them to replace the battery because their diagnostics passed.

I'm in the situation where Apple won't even let me pay to replace my battery even though I have random shut downs and blatant CPU throttling when below 50%.
Score: 126 Votes (Like | Disagree)
Nimrad Avatar
85 months ago
Aah, the good ol' "it's not a bug, it's a feature".
Score: 79 Votes (Like | Disagree)
jclardy Avatar
85 months ago
Once again, nothing untoward here, even though many chose to jump on the Apple conspiracy bandwagon.
I'm a big Apple fan, but this is a bit shady, if only because it took people digging this up to get them to admit it.

The problem with them not saying anything about it is this scenario:

1. iPhone battery degrades after 1.5 years. iPhone slows down.
2. This user notices the phone is really slow, but they don't notice a battery issue. In their mind they need a newer, faster phone to fix it.
3. They buy a new iPhone and things are fine, for now.

The issue is that by not disclosing this, and by throttling versus letting the battery degradation become apparent, they are misleading people into a $700 upgrade rather than a $100 repair.

Apple needs to disclose this information in software now that they have been outed, showing info like battery cycles and whether performance is being throttled in the battery settings menu.
Score: 67 Votes (Like | Disagree)
cale508 Avatar
85 months ago
Make it easier for the end user to replace battery and people won't complain.
Score: 59 Votes (Like | Disagree)
ahostmadsen Avatar
85 months ago
Technically this is OK. What is not OK is
1. Apple was not being transparent about it. So, people would be fooled into upgrading their phones.
2. While it can be used to manage older batteries, and can also be used to hide battery defects.
Score: 58 Votes (Like | Disagree)
ArneK Avatar
85 months ago
So in other words: they are selling devices that after a couple of weeks deliver app. 50% of the promised power and call that a feature...
Score: 45 Votes (Like | Disagree)