Apple Watch Battery to Support Five Hours of Heavy Usage, Will Last All Day With Mixed Use

With just over two days to go until Apple's big March 9 "Spring Forward" event that's said to be heavily focused on the Apple Watch, information on the device is leaking out at a rapid pace. Apple's been relatively quiet about battery life, stating only that the Apple Watch will need to be charged on a daily basis, but 9to5Mac has a few more details on how long we can expect the Apple Watch to last between charges.

According to the site's sources, final software tweaks and optimizations to the device have led to a battery life of approximately five hours of heavy application usage. The device reportedly will not run out of battery life "during a typical day of mixed and passive use," but it will need to be charged on a nightly basis as Apple has previously said. There's also been little said about how the Apple Watch will affect the battery of the iPhone, but 9to5Mac's sources say that there is no "meaningful" observed battery drain while using the device.

applewatchgraystainless
A Power Reserve Mode can be activated within the watch when the battery in the device becomes critically low, ensuring that it's primary function -- telling the time -- is always available. Power Reserve Mode can be activated at any time via a Battery Life Glance screen.

Power Reserve Mode can even be accessed when the Watch has a full 100% charge, and it is not solely activated when the Watch's battery life is low. The mode noticeably dims the display, slows down communication with the iPhone to an on-demand level, and puts the display to sleep after roughly two seconds of inactivity. One unit tested allowed access to all Apple Watch functions while in Power Reserve mode, while another unit was limited to the Clock face.

The Apple Watch is also said to have an interesting method of displaying remaining battery life. At 20 percent, the Battery Life Glance (which is just one of many default glances on the watch) will turn an orange/amber color to let users know that battery life is running low, and at 10 percent, it will turn from amber to red.

Along with battery life, there are also some new details on onboard storage. We've known for awhile that the device will have dedicated storage for features like music storage, but the exact amount of storage has not yet been shared. It appears that prototype devices have 8GB of storage, suggesting at least some devices will ship with that amount of storage space. Like with the iPhone, there may be several storage options that are available at an additional cost.

In just a few short days, we'll have a wealth of information on the Apple Watch. Apple is expected to share more details on battery life, storage space, pricing tiers, and accessory options at its upcoming March 9 event. Apple is planning to live stream the event, and MacRumors will also provide live coverage, both on MacRumors.com and through the MacRumorsLive Twitter account.

Related Roundup: Apple Watch 10
Tag: 9to5Mac
Buyer's Guide: Apple Watch (Caution)

Popular Stories

apple wallet drivers license feature iPhone 15 pro

iPhone Driver's Licenses: These 17 U.S. States Offer Them or Will Later

Thursday June 19, 2025 11:28 am PDT by
In select U.S. states, residents can add their driver's license or state ID to the Wallet app on the iPhone and Apple Watch, providing a convenient and contactless way to display proof of identity or age at select airports and businesses, and in select apps. Unfortunately, this feature continues to roll out very slowly since it was announced in 2021, with only nine U.S. states and Puerto...
apple watch ultra 2 new black

Apple Watch Ultra 3 Finally Coming After Two-Year Hiatus

Monday June 16, 2025 8:45 am PDT by
Apple will finally deliver the Apple Watch Ultra 3 sometime this year, according to analyst Jeff Pu of GF Securities Hong Kong (via @jukanlosreve). The analyst expects both the Apple Watch Series 11 and Apple Watch Ultra 3 to arrive this year (likely alongside the new iPhone 17 lineup, if previous launches are anything to go by), according to his latest product roadmap shared with...
iPhone 17 Pro Blue Feature Tighter Crop

iPhone 17 Pro Launching in Three Months With These 12 New Features

Saturday June 14, 2025 5:45 pm PDT by
The iPhone 17 Pro and iPhone 17 Pro Max are three months away, and there are plenty of rumors about the devices. Below, we recap key changes rumored for the iPhone 17 Pro models as of June 2025:Aluminum frame: iPhone 17 Pro models are rumored to have an aluminum frame, whereas the iPhone 15 Pro and iPhone 16 Pro models have a titanium frame, and the iPhone X through iPhone 14 Pro have a...
ios 26 call holding

iOS 26 Beta is Hiding a New Ringtone — Here's What It Sounds Like

Thursday June 19, 2025 7:25 pm PDT by
Apple is hiding a new ringtone within iOS 26. The new ringtone is an alternative version of the existing Reflection ringtone, which has been the default ringtone since the iPhone X was released in 2017. It was discovered within the code for the first developer beta of iOS 26, but it remains hidden, so you will not find it in the list of ringtones available in the Settings app for now. It...
iOS 18

Apple Releases iOS 18.6 Public Beta

Wednesday June 18, 2025 10:24 am PDT by
Apple today seeded the first betas of upcoming iOS 18.6 and iPadOS 18.6 updates to public beta testers, with the betas coming just a few days after Apple provided the betas to developers. Testers who have signed up for beta updates through Apple's beta site can download iOS 18.6 and iPadOS 18.6 from the Settings app on a compatible device by going to General > Software Update. When the...
General Spotify Feature

Spotify Preparing to Launch Long-Awaited Lossless Audio Tier on iPhone

Thursday June 19, 2025 1:46 pm PDT by
Spotify appears to be gearing up to launch its long-awaited lossless music tier. Chris Messina (via TechCrunch) and Spicetify (via The Verge) spotted new lossless references within the code for Spotify's desktop app and web player. With assistance from Aaron Perris, MacRumors has confirmed that the latest beta of the Spotify app for the iPhone also contains new lossless-related code....
iPhone 16 Battery Life Feature

iOS 26's New Battery Life Mode Available Only on These iPhone Models

Saturday June 21, 2025 9:02 am PDT by
Last week, we reported that iOS 26 introduces an opt-in Adaptive Power Mode on the iPhone, alongside the existing Low Power Mode. Apple says that Adaptive Power Mode can make "small performance adjustments" when necessary to extend an iPhone's battery life, including slightly lowering the display brightness or allowing some activities to "take a little longer." The full description of...
new iphone lockscreen ios 26

iOS 26: Five Changes Coming to Your iPhone Lock Screen

Tuesday June 17, 2025 8:46 am PDT by
With iOS 26, Apple has made some additions to the iPhone Lock Screen that aim to make it more customizable than ever. Of course, things can always change before the software makes its way to the general iPhone-owning public, but here are five new things iOS 26 can do on the Lock Screen as of the current developer beta. Widgets Top or Bottom In iOS 18, the row of widgets on your Lock...
Craig Federighi No

John Gruber Reacts to Apple Declining His Interview After His Criticism

Wednesday June 18, 2025 8:10 pm PDT by
Every year between 2015 and 2024, at least one Apple executive agreed to be interviewed by Daring Fireball's John Gruber for a special WWDC episode of his podcast, The Talk Show. Last year, for example, Apple's software engineering chief Craig Federighi, marketing chief Greg Joswiak, and top AI researcher John Giannandrea joined Gruber on stage at the California Theatre in San Jose to discuss...

Top Rated Comments

randymac09 Avatar
134 months ago
I think we will be ok.

Maybe I just haven't seen it, but in the back and forth about battery life, no one has mentioned that Tim Cook, the one who stated the watch would have all day batter life, probably has a way more connected life than any one here.

Someone did mention his routine of waking up early and staying up late. However, no one has brought up the idea of how many notifications he receives a day. How many times he has to check his watch to see when his next appointment is, or if he will be on time for that appointment. He gets emails, texts, calls, all sorts of notifications throughout the day. If the watch can survive a day of use on his wrist, I think that it will do for most.

Or I could be wrong and everyone can laugh at me. Either-or.
Score: 53 Votes (Like | Disagree)
FrankySavvy Avatar
134 months ago
5 hours of heavy use is alot guys. thats like sitting down fiddling with it for five hours straight. I don't think most of us are gonna even come close to that. Its always gonna be on our wrist, say we use it for a solid 10 minutes per hour of our waking day, thats a little over two hours of constant use, the rest of the time the display will be off, so i think this is great news!
Score: 46 Votes (Like | Disagree)
troop231 Avatar
134 months ago
Let's say worst case and most unlikely scenario: you interact with your Watch for 30 seconds each time, so with the stated 5 hours of life, you could get potentially 600 30 second interactions which should be plenty!

Again, this is worst case scenario and Apple is recommending 10 second interactions to devs for app designs. :)
Score: 18 Votes (Like | Disagree)
JayLenochiniMac Avatar
134 months ago
This is the reason I won't be buying one.

A watch that lasts you all day is the reason you won't be buying one? How's this any different from the iPhone (or any iDevice for that matter)?
Score: 16 Votes (Like | Disagree)
SMIDG3T Avatar
134 months ago
This is fine. I can tell you, if you spend 5 HOURS a day using the watch, you have a problem.
Score: 11 Votes (Like | Disagree)
Sharkey311 Avatar
134 months ago
I'm not surprised. it took Apple until the iPhone 6 Plus to upgrade the battery to a decent 2,915 mAh which still is horrible compared to the 3,200mAh on the Galaxy Note 4 and 3,000mAh on LG G3...etc. Android wear smartwatches come with 300-400 mAh and last up to 2-3 days depending on usage. My ASUS Zenwatch lasts 3 days. My Michael Bastian Cronowing smartwatch lasts up a week and a half long of battery life. 5 hours of battery life on heavy usage is what 80% of users will using. With the newly announced LG Watch Urbane with 300 mAh and Huawei Watch with 400 mAh, they will truly outshine Apple watch as Android smartphones have performed circles on iPhones since 2010 and will continue to do so unless Apple wakes up and actually innovates.
You have absolutely no idea what you're talking about.
Score: 11 Votes (Like | Disagree)