Apple Shares List of 12 Features Affected by watchOS 9's New Low Power Mode

watchOS 9 introduces a new Low Power Mode for the Apple Watch Series 4 and later that is designed to extend battery life by disabling or limiting some features and sensors while enabled, such as the always-on display and background heart rate monitoring.

Apple Watch Low Power Mode watchOS 9
In a new support document published today, Apple detailed specific features that are disabled or affected when Low Power Mode is turned on:

Low Power Mode turns off these features
- Always On display
- Heart rate notifications for irregular rhythm, high heart rate, and low heart rate
- Background heart rate measurements
- Background blood oxygen measurements
- Start workout reminder

Low Power Mode turns off these features when your iPhone isn't nearby
- Wi-Fi and cellular connections
- Incoming phone calls and notifications

Low Power Mode affects these features
- Making a phone call can take longer
- Background app refresh happens less frequently
- Complications update less frequently
- Siri can take longer to process a request
- Some animations and scrolling might appear less smooth

For safety purposes, Apple says Fall Detection continues to work in Low Power Mode.

To enable Low Power Mode, swipe up on the watch face to open Control Center, tap on the battery percentage button, and turn on Low Power Mode.

When an Apple Watch's battery percentage drops to 10%, a Low Power Mode alert asks users if they want to turn on the feature. Low Power Mode turns off automatically when an Apple Watch is charged to 80%, unless users manually turn it on for a set number of days.

Apple says users can have Low Power Mode turn on automatically when they begin a workout, with metrics such as heart rate and pace still measured.

Apple notes that when Low Power Mode is enabled without your iPhone nearby, and you open an app that requires a data connection, Wi-Fi or cellular connectivity will resume so that the app can function properly, which can cause "significant battery consumption."

watchOS 9 was released today as a free software update for the Apple Watch Series 4 and later. The new Low Power Mode is separate from the Apple Watch's existing Power Reserve mode that only displays the clock when enabled.

Related Roundup: Apple Watch Series 8
Buyer's Guide: Apple Watch (Buy Now)
Related Forum: Apple Watch

Top Rated Comments

GuruZac Avatar
11 weeks ago
“Low Power Mode turns your smartwatch in to a conventional watch, and we think you’re gonna love it.”
Score: 27 Votes (Like | Disagree)
fwmireault Avatar
11 weeks ago

So, if I understand correctly, the built-in Workouts app continues to record a workout even if the watch goes into low-power mode? If so, this alone absolutely makes me want to upgrade.
I don’t know which Apple Watch you currently have, but Low Power Mode is coming to Apple Watch S4 and later
Score: 11 Votes (Like | Disagree)
gund1234 Avatar
11 weeks ago

Welp, wouldn’t want to do without background heart rate recording so I guess I won’t be using this after all.
Apple should have given customers options to fine tune it probably.
Score: 9 Votes (Like | Disagree)
LeadingHeat Avatar
11 weeks ago

For safety purposes, Apple says Fall Detection continues to work in Low Power Mode.
I guess irregular hearth rhythm notifications didn’t make the cut for safety
Score: 8 Votes (Like | Disagree)
erikkfi Avatar
11 weeks ago
Welp, wouldn’t want to do without background heart rate recording so I guess I won’t be using this after all.
Score: 7 Votes (Like | Disagree)
gund1234 Avatar
11 weeks ago
Let the complaints begin.
Score: 5 Votes (Like | Disagree)

Related Stories

Apple Watch Low Power Mode watchOS 9

watchOS 9 Introduces New Low Power Mode on Apple Watch Series 4 and Later

Wednesday September 7, 2022 10:25 am PDT by
Apple today announced that watchOS 9 will feature a new Low Power Mode on the Apple Watch Series 4 and newer. When the Low Power Mode is enabled, the Apple Watch will be able to get up to 36 hours of battery life per charge. Apple says Low Power Mode will temporarily disable or limit select sensors and features, including the always-on display, autostart workouts, heart health notifications, ...
watchOS 9 Feature

Apple Watch's Rumored Low Power Mode 'Still in Development' for watchOS 9

Sunday July 10, 2022 6:43 am PDT by
In his Power On newsletter today, Bloomberg's Mark Gurman said an expanded Low Power Mode is still in development for the Apple Watch and on track for release around the same time as the public release of watchOS 9 later this year. While the Apple Watch already features a Power Reserve mode that displays only the time on the screen to preserve battery life, Gurman said the expanded Low Power ...
Apple Watch Series 7 Rainbow Crop Blue

Apple Watch Finally Getting Vital iPhone Feature This Year

Wednesday April 27, 2022 2:20 am PDT by
A vital iPhone, iPad, and MacBook feature is set to come to the Apple Watch this year as part of watchOS 9, according to a recent report from Bloomberg's Mark Gurman. watchOS 9, the next major version of the Apple Watch's operating system, will reportedly introduce Low Power Mode. Low Power Mode will allegedly be distinct from the existing Power Reserve mode on the Apple Watch. Power Reserve ...
apple watch ultra 1

Apple Watch Ultra Will Get Up to 60 Hours of Battery Life With Software Update Later This Year

Wednesday September 7, 2022 4:09 pm PDT by
With the 49mm case size and updated design of the Apple Watch Ultra, Apple was able to fit in a much larger battery. As a result, the Apple Watch Ultra is able to last for up to 36 hours on a single charge with normal use, and even longer with a new Low Power Mode and battery optimization options. Apple defines "normal" use for the 36 hour metric as 180 time checks, 180 notifications, 90...
watchOS 9 header

Apple Releases watchOS 9 With Medication Tracking, New Watch Faces, Sleep Updates, and More

Monday September 12, 2022 9:57 am PDT by
Apple today released watchOS 9, the latest version of the watchOS operating system designed to run on newer Apple Watch models. watchOS 8 is compatible with the Apple Watch Series 4 and later. watchOS 9 can be downloaded for free through the Apple Watch app on the iPhone by opening it up and going to General > Software Update. To install the new software, the Apple Watch needs to have at...
watchOS 8 Green BG Feature

Expanded Low-Power Mode in watchOS 9 Will Work With More Apps and Features

Tuesday April 12, 2022 5:35 am PDT by
watchOS 9 will feature a new power-saving mode that will let users use an Apple Watch and its apps and features without taking up a significant amount of battery life, Bloomberg's Mark Gurman reported today. Currently, the Apple Watch features "Power Reserve" mode, which greatly limits Apple Watch functionality to only show users the time. With watchOS 9, Apple is looking to port over Low...
Apple Watch 6 New Features Feature 2

Six New Apple Watch Features Coming Later This Year

Friday September 23, 2022 8:12 am PDT by
With new Apple Watch Ultra and Series 8 models now in the hands of customers, Apple has brought a host of smart new features to many people's wrists. But there's more to come. Apple has a handful of additional features in store for Apple Watch Series 8 and Apple Watch Ultra owners before the year's end, and some of them are watchOS 9 functions, which means they will even work on older Apple ...
watchOS 9 Feature

Apple Releases watchOS 9.1 With Battery Life Improvements and Matter Integration

Monday October 24, 2022 9:54 am PDT by
Apple today released watchOS 9.1, the first major update to the watchOS 9 operating system that came out in September. watchOS 9.1 has gone through several rounds of beta testing, and it accompanies the macOS Ventura launch, and the debut of iOS 16.1 and iPadOS 16.1. watchOS 9.1 can be downloaded for free through the Apple Watch app on the iPhone by opening it up and going to General >...

Popular Stories

General Black Friday Deals 2022 Green

All the Apple Black Friday Deals You Can Still Get

Friday November 25, 2022 4:40 am PST by
Although Black Friday is now technically over, many Apple products are still seeing major discounts through the weekend as we head into Cyber Monday. In this article, you'll find every Apple device with a notable Black Friday sale that's still available. We'll be updating as prices change and new deals arrive, so be sure to keep an eye out if you don't see the sale you're looking for yet. Note:...
iphone 14 pro hands snowflakes 1

Best Cyber Monday iPhone Deals Available Today

Wednesday November 23, 2022 1:55 pm PST by
Cellular carriers have always offered big savings on the newest iPhone models during the holidays, and Cyber Monday is no different. We're tracking notable offers on the iPhone 14 and iPhone 14 Pro devices from AT&T, Verizon, and T-Mobile. For even more savings, keep an eye on older models like the iPhone 13. Note: MacRumors is an affiliate partner with some of these vendors. When you click a...
maxresdefault

Nothing Phone 1 Displays AirPods Battery Level After Latest OS Update

Friday November 25, 2022 3:33 am PST by
Nothing Phone 1 users today began receiving the Nothing OS 1.1.7 update, which adds support for displaying the battery percentage of connected AirPods, amongst other improvements and bug fixes. If you own a Nothing Phone 1, you can check for the OTA update by going to Settings -> System -> System updates. Bear in mind that as support for displaying AirPods battery level is still an...
ipad holiday bulbs

Best Cyber Monday iPad Deals Available Today

Thursday November 24, 2022 12:25 pm PST by
Cyber Monday deals have been in full swing since Black Friday deals ended, and we're seeing solid discounts on Apple devices. We're highlighting the best sales for all of Apple's product lines, and in this article you'll find the best Cyber Monday sales on iPad, iPad Pro, iPad Air, and iPad mini. Note: MacRumors is an affiliate partner with some of these vendors. When you click a link and make ...
airpods pro 2

Apple Engineer Addresses Lack of Lossless Support on New AirPods Pro

Friday November 25, 2022 2:58 am PST by
An Apple engineer has addressed the lack of lossless audio support in the second-generation AirPods Pro in a new interview. Current Bluetooth technology in the AirPods lineup means that Apple's audio products do not support Apple Music Lossless audio. Apple has previously hinted that it may develop its own codec and connectivity standard that builds on AirPlay and supports higher quality...
Cyber Monday Deals Feature 2022

Best Cyber Monday Apple Deals Still Available for AirPods, Apple TV, iPad, and More

Monday November 28, 2022 5:24 am PST by
The Black Friday and Cyber Monday holiday shopping rush is drawing to a close, but there are still some good deals to be had out there. For Apple products, many of the deals you've seen since last week are still available, though some have expired. So for anyone who missed out on Black Friday deals, there's still an opportunity to get some of the year's best prices on many Apple devices. Note: ...
Apple Watch Ultra Oceanic Plus App

Apple Announces Oceanic+ App Now Available for Apple Watch Ultra

Monday November 28, 2022 6:11 am PST by
Apple today announced that the Oceanic+ app is available for the Apple Watch Ultra starting today. Designed by Huish Outdoors in collaboration with Apple, the app serves as a dive computer for recreational scuba diving at depths up to 40 meters/130 feet. Apple already offers a basic Depth app on the Apple Watch Ultra for viewing your current depth, maximum depth reached, water temperature,...
Three Biggest iPhone SE 4 Questions Feature

Three Biggest Questions About the iPhone SE 4

Saturday November 26, 2022 12:00 am PST by
While we already have some clear indications about what to expect from the fourth-generation iPhone SE, there are three major questions looming over the device at the current time. Chinese site MyDrivers and and leaker Jon Prosser believe that the iPhone SE is set to move to an iPhone XR-like design in its next incarnation, which would involve eliminating the Home button and adding a "notch" ...