Apple Watch Series 4 and 5 Will Recalibrate Maximum Battery Capacity With watchOS 9

With watchOS 9, Apple is adding a new recalibration feature for the Apple Watch Series 4 and Apple Watch Series 5, according to the watchOS 9 release notes. The recalibration will result in a more accurate estimate for maximum battery capacity.

apple watch series 5

After updating to watchOS 9, your Apple Watch Series 4 or Series 5 will recalibrate and then estimate its maximum battery capacity more accurately.

Following the watchOS 9 update, Apple Watch Series 4 and Series 5 owners who have noticed battery life being misrepresented should be able to get a better read on how long their device will last.

Apple has previously introduced recalibration functionality for the iPhone 11 to make ‌iPhone‌ battery life estimates more accurate, but there has been no similar feature made available for the Apple Watch until now.

The recalibration process will happen during the update and will be complete once it's installed.

Related Roundup: watchOS 11
Related Forum: Apple Watch

Popular Stories

iPhone SE 4 Thumb 1

iPhone SE 4 With Apple's Own 5G Modem 'Confirmed' to Launch in March

Tuesday November 19, 2024 12:12 pm PST by
Barclays analyst Tom O'Malley and his colleagues recently traveled to Asia to meet with various electronics manufacturers and suppliers. In a research note this week, outlining key takeaways from the trip, the analysts said they have "confirmed" that a fourth-generation iPhone SE with an Apple-designed 5G modem is slated to launch towards the end of the first quarter next year. In line with previo...
airtag purple

AirTag 2 Rumored to Launch Next Year With These New Features

Sunday November 17, 2024 5:18 am PST by
Apple released the AirTag in April 2021, so it is now three over and a half years old. While the AirTag has not received any hardware updates since then, a new version of the item tracking accessory is rumored to be in development. Below, we recap rumors about a second-generation AirTag. Timing Apple is aiming to release a new AirTag in mid-2025, according to Bloomberg's Mark Gurman....
Magic Mouse Next to Keyboard

No, Apple CEO Tim Cook Didn't Say He Prefers Logitech's MX Master 3 Over the Magic Mouse

Sunday November 17, 2024 3:03 pm PST by
While the Logitech MX Master 3 is a terrific mouse for the Mac, reports claiming that Apple CEO Tim Cook prefers that mouse over the Magic Mouse are false. The Wall Street Journal last month published an interview with Cook, in which he said he uses every Apple product every day. Soon after, The Verge's Wes Davis attempted to replicate using every Apple product in a single day. During that...
Generic iOS 18 Feature Real Mock

Apple Releases iOS 18.1.1 and iPadOS 18.1.1 With Security Fixes

Tuesday November 19, 2024 10:10 am PST by
Apple today released iOS 18.1.1 and iPadOS 18.1.1, minor updates to the iOS 18 and iPadOS 18 operating systems that debuted earlier in September. iOS 18.1.1 and iPadOS 18.1.1 come three weeks after the launch of iOS 18.1. The new software can be downloaded on eligible iPhones and iPads over-the-air by going to Settings > General > Software Update. Apple has also released iOS 17.7.2 for...
at t turbo indicator iphone 16 pro max v0 8hrh7w5f3w1e1

AT&T Turbo Indicator Showing Up in iPhone Status Bar for Subscribers

Wednesday November 20, 2024 3:42 am PST by
AT&T has begun displaying "Turbo" in the iPhone carrier label for customers subscribed to its premium network prioritization service, according to reports on Reddit. The new indicator seems to have started appearing after users updated to iOS 18.1.1, but that could be just coincidence. Image credit: Reddit user No_Highlight7476 The Turbo feature provides enhanced network performance through ...
iPhone 17 Slim Feature Single Camera 1 Redux

'iPhone 17 Air' Rumored to Surpass iPhone 6 as Thinnest iPhone Ever

Monday November 18, 2024 1:07 pm PST by
In a research note with Hong Kong-based investment bank Haitong today, obtained by MacRumors, Apple analyst Jeff Pu said he agrees with a recent rumor claiming that the so-called "iPhone 17 Air" will be around 6mm thick. "We agreed with the recent chatter of an 6mm thickness ultra-slim design of the iPhone 17 Slim model," he wrote. If that measurement proves to be accurate, there would be ...
bug security vulnerability issue fix larry

Make Sure to Update: iOS 18.1.1 and macOS Sequoia 15.1.1 Fix Actively Exploited Vulnerabilities

Tuesday November 19, 2024 10:52 am PST by
The iOS 18.1.1, iPadOS 18.1.1, and macOS Sequoia 15.1.1 updates that Apple released today address JavaScriptCore and WebKit vulnerabilities that Apple says have been actively exploited on some devices. With the JavaScriptCore vulnerability, processing maliciously crafted web content could lead to arbitrary code execution. The WebKit vulnerability had the same issue with maliciously crafted...

Top Rated Comments

applefanboysince93 Avatar
32 months ago
instead of a %batteryLife estimate there’ll be a $BuyANewWatch message ;)
Score: 16 Votes (Like | Disagree)
Blackstick Avatar
32 months ago
End of the day... the issue is those cells are pushing 4 years old in the case of a well used/loved Series 4. Software optimization can only go so far when you're talking about a 4 year old battery with 1400 cycles on it.
Score: 9 Votes (Like | Disagree)
wwooden Avatar
32 months ago
My Series 4 is at 80% battery health. Doesn't affect any of my day-to-day: I still can workout in the morning, wear it all day at work, and still do more activities in the evening before it starts to get close to 15-20%. When it starts affecting my daily activities, I'll just pay to get the battery replaced. The feature set of the Series 4 meets all my needs.
Score: 3 Votes (Like | Disagree)
SantaFeNM Avatar
32 months ago

For a $79 battery replacement fee does the Apple Store change the battery or just give you a new AWS4?
I had the battery replaced in my AW S4 in March of 2021. I had a significant scratch on the screen when I sent it off. Apple sent back to me a new AW S4, of course with a new battery and pristine screen. A big win-win in my case and opinion.
Score: 3 Votes (Like | Disagree)
Shirasaki Avatar
32 months ago
My series 4 still hold strong after all these years (4 years). 88% battery health. Good enough feature set to last incredibly long. Wonder how this “calibration” would work.
Score: 3 Votes (Like | Disagree)
HappyDude20 Avatar
32 months ago
For a $79 battery replacement fee does the Apple Store change the battery or just give you a new AWS4?


Not applicable to my S5 since I will not be downloading iOS 16 until next Summer, at the earliest.
Why holding out?
Score: 2 Votes (Like | Disagree)