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

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Top Rated Comments

JulianL Avatar
10 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
10 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
10 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
10 months ago
And extra 22 mAh on the Ultra 2, I'll take it :)
Score: 4 Votes (Like | Disagree)
Fuzzball84 Avatar
10 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
10 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)