Apple Watch Series 9 and Ultra 2 Battery Capacities Revealed in Regulatory Database

Apple does not list battery capacities for the new Apple Watch Series 9 and Ultra 2 models, but MacRumors has discovered this information in a Chinese regulatory database today, and we have outlined our findings below.

Apple Watch Series 9
According to the database, which only provides Apple model numbers instead of product names, the 41mm and 45mm Apple Watch Series 9 models appear to be equipped with 282 mAh and 308 mAh batteries, respectively. These capacities are unchanged compared to the equivalent Apple Watch Series 8 models, which makes sense given that Apple says the Series 9 models have the same 18-hour battery life as Series 8 models.

As for the Apple Watch Ultra 2, it appears to be equipped with a 564 mAh battery, which is approximately 4% larger than the 542 mAh battery in the original Apple Watch Ultra. However, Apple says the Ultra 2 has the same 36-hour battery life as the original Ultra, likely due to it having a brighter display and other new features.

A recap of the Apple Watch battery capacities listed in the database:

Apple Watch Battery Capacity
Apple Watch Series 9 (41mm)
282 mAh
Apple Watch Series 8 (41mm)
282 mAh
Apple Watch Series 9 (45mm)
308 mAh
Apple Watch Series 8 (45mm)
308 mAh
Apple Watch Ultra 2
564 mAh
Apple Watch Ultra
542 mAh


New features for both the Apple Watch Series 9 and Ultra 2 include brighter displays, a faster S9 chip, a new "Double Tap" gesture for interacting with the watches without touching the screen, and more. Both new models have been available to order since Tuesday and will begin arriving to customers and launch in stores on Friday, September 22.

MacRumors also found the same battery capacities for what appears to be the iPhone 15 Plus, iPhone 15 Pro, and iPhone 15 Pro Max as were reported earlier today. We were unable to find a listing for the regular iPhone 15 battery.

Related Forum: Apple Watch

Popular Stories

iPadOS 26 App Windowing

Apple Explains Why iPads Don't Just Run macOS

Friday June 13, 2025 7:46 am PDT by
iPadOS 26 allows iPads to function much more like Macs, with a new app windowing system, a swipe-down menu bar at the top of the screen, and more. However, Apple has stopped short of allowing iPads to run macOS, and it has now explained why. In an interview this week with Swiss tech journalist Rafael Zeier, Apple's software engineering chief Craig Federighi said that iPadOS 26's new Mac-like ...
iphone 16 pro models 1

17 Reasons to Wait for the iPhone 17

Thursday June 12, 2025 8:58 am PDT by
Apple's iPhone development roadmap runs several years into the future and the company is continually working with suppliers on several successive iPhone models simultaneously, which is why we often get rumored features months ahead of launch. The iPhone 17 series is no different, and we already have a good idea of what to expect from Apple's 2025 smartphone lineup. If you skipped the iPhone...
Logitech Logo Feature

Logitech Announces Two New Accessories for WWDC

Friday June 13, 2025 7:22 am PDT by
Alongside WWDC this week, Logitech announced notable new accessories for the iPad and Apple Vision Pro. The Logitech Muse is a spatially-tracked stylus developed for use with the Apple Vision Pro. Introduced during the WWDC 2025 keynote address, Muse is intended to support the next generation of spatial computing workflows enabled by visionOS 26. The device incorporates six degrees of...
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 Screens

Here Are All the iOS 26 Features That Require iPhone 15 Pro or Newer

Thursday June 12, 2025 4:53 am PDT by
With iOS 26, Apple has introduced some major changes to the iPhone experience, headlined by the new Liquid Glass redesign that's available across all compatible devices. However, several of the update's features are exclusive to iPhone 15 Pro and iPhone 16 models, since they rely on Apple Intelligence. The following features are powered by on-device large language models and machine...
CarPlay Liquid Glass Dark

Apple to Let iPhone Users Watch Videos on CarPlay Screen While Parked

Thursday June 12, 2025 6:16 am PDT by
Apple this week announced that iPhone users will soon be able to watch videos right on the CarPlay screen in supported vehicles. iPhone users will be able to wirelessly stream videos to the CarPlay screen using AirPlay, according to Apple. For safety reasons, video playback will only be available when the vehicle is parked, to prevent distracted driving. The connected iPhone will be able to...
iOS 26 on Three iPhones

Hate iOS 26's Liquid Glass Design? Here's How to Tone It Down

Wednesday June 11, 2025 4:22 pm PDT by
iOS 26 features a whole new design material that Apple calls Liquid Glass, with a focus on transparency that lets the content on your display shine through the controls. If you're not a fan of the look, or are having trouble with readability, there is a step that you can take to make things more opaque without entirely losing out on the new look. Apple has multiple Accessibility options that ...
Mac Studio Feature

Apple Begins Selling Refurbished Mac Studio With M4 Max and M3 Ultra Chips at a Discount

Thursday June 12, 2025 10:14 am PDT by
Apple today added Mac Studio models with M4 Max and M3 Ultra chips to its online certified refurbished store in the United States, Canada, Japan, Singapore, and many European countries, for the first time since they were released in March. As usual for refurbished Macs, prices are discounted by approximately 15% compared to the equivalent new models on Apple's online store. Note that Apple's ...
iOS 26 Feature

Apple Seeds Revised iOS 26 Developer Beta to Fix Battery Issue

Friday June 13, 2025 10:15 am PDT by
Apple today provided developers with a revised version of the first iOS 26 beta for testing purposes. The update is only available for the iPhone 15 and iPhone 16 models, so if you're running iOS 26 on an iPhone 14 or earlier, you won't see the revised beta. Registered developers can download the new beta software through the Settings app on each device. The revised beta addresses an...

Top Rated Comments

JulianL Avatar
23 months ago
For travel I would love the iPhone to have the ability to wirelessly charge an Apple Watch. If you forget your phone charger or it (or the cable) breaks or is lost while away it is pretty easy to source a replacement. Now that we have the USB-C standard hotel reception could probably lend you a cable (at worst to be plugged into the USB port on a TV to get power) or many shops will sell such a cable but getting hold of an Apple Watch charger at short notice is a much more difficult proposition. Knowing that in an emergency one’s iPhone could act as an AW charger would be a really nice thing to have in my opinion.
Score: 7 Votes (Like | Disagree)
spazzcat Avatar
23 months ago

I personally don’t even need an Apple Watch lasting more than a day like I do not want my watch to suddenly die on me in the middle of day X. I rather charge it before bed and start the day at 100% without any worry of it making it through another day
With the fast charging, it doesn't take long to charge your watch fully.
Score: 5 Votes (Like | Disagree)
DotCom2 Avatar
23 months ago

I personally don’t even need an Apple Watch lasting more than a day like I do not want my watch to suddenly die on me in the middle of day X. I rather charge it before bed and start the day at 100% without any worry of it making it through another day
I agree. I actually have two watches. My fancy one that I wear out and about, and my house watch that I wear sleeping/showering etc. and just hanging. One of them is always ready to go! I never run out of battery.
Score: 4 Votes (Like | Disagree)
Radeon85 Avatar
23 months ago
And extra 22 mAh on the Ultra 2, I'll take it :)
Score: 4 Votes (Like | Disagree)
Fuzzball84 Avatar
23 months ago
I think it's just the best compromise. Some people like myself have small wrists and I have no issues charging my watch every day or two... its become second nature. I truly appreciate what it can do given its size. Best of all, my watch is Apple Watch 4 from 2019 and its battery health is at 86 percent, still getting a decent runtime. It's really a testament to how good the batteries are that it's still going strong after 4 years of daily usage.
Score: 4 Votes (Like | Disagree)
ApplesAreSweet&Sour Avatar
23 months ago
Fast charging does make wearing an AW feasible.

However, an upgrade to battery life is much needed -I consistently have to charge it two times per day if I’m doing sleep tracking and 30-90 minutes workout tracking.

What we need is the Ultra’s 542 mAhs in the standard watches.

Now that would be a reason to upgrade!
Score: 3 Votes (Like | Disagree)