Apple Watch Series 9 and Ultra 2 Battery Capacities Revealed in Regulatory Database - MacRumorsOpen MenuShow RoundupsShow Forums menuVisit ForumsOpen Sidebar
Skip to Content

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

youtube iphone apple watch health ad 2026

New Apple Ad Sells the iPhone and Apple Watch Health Pairing

Thursday April 23, 2026 11:18 am PDT by
Apple has published a new ad to appeal to customers in the market for an iPhone and Apple Watch pairing, highlighting the insights it can offer for your health. Titled simply "Health with iPhone + Apple Watch," the half-minute ad focuses on a woman waiting in line at a cafe who begins receiving unsolicited health and fitness advice from other people in the queue, as well as local residents,...
watchos 26 gradient light

This New Apple Watch Face Is Coming in watchOS 26.5

Friday April 24, 2026 5:51 am PDT by
iOS 26.5 and watchOS 26.5 will have a new Pride Luminance wallpaper and Apple Watch face when the updates are released in the coming weeks, according to Bloomberg's Mark Gurman. In a brief tweet, Gurman revealed that Pride Luminance will "Celebrate the vibrancy and individuality of the LGBTQ+ community and customize your watch face with colors from Pride flags." iOS 26.5 has been in...
modular ultra training load

watchOS 27 to Offer New Watch Faces, Including 'Modular Ultra' Variant

Monday May 4, 2026 5:58 am PDT by
For watchOS 27, Apple is testing new Apple Watch faces, and one of them is a simpler version of an existing Apple Watch Ultra watch face that could be coming to standard Series models. Writing in his latest Power On newsletter, Bloomberg's Mark Gurman reports that Apple is testing multiple new faces for watchOS 27, code-named "Orchid." One of them is said to be a "simplified take" on the...

Top Rated Comments

35 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
35 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)
35 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)
35 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)
Radeon85 Avatar
35 months ago
And extra 22 mAh on the Ultra 2, I'll take it :)
Score: 4 Votes (Like | Disagree)
F23 Avatar
35 months ago

Seriously? It just has a brighter screen & double tap. That’s it. I’m holding onto my ultra 2,000 nits & 3 day battery life… 👍🏻
sarcasm lol. i agree the ultra 1 is more than perfect still. mine is at 100% battery health too
Score: 3 Votes (Like | Disagree)