Highlights
- iPhone 17 Series regulatory listings confirm larger batteries across the iPhone 17 lineup.
- The Pro Max battery reaches up to 5088mAh and the new slim Air model offering up to 3149mAh.
- Apple is optimising internal space in eSIM-only models, boosting battery capacity by up to 6.6% compared to physical SIM versions.
- Leaked images show a vibrant orange strap designed for the iPhone 17’s TechWoven case, confirming lanyard loops for hands-free carry.
With just one day to go before Apple’s big launch event, a fresh leak has revealed the actual battery capacities of the upcoming iPhone 17 series. The listings was spotted on China’s regulatory database and it confirms that most of the new iPhones will feature larger batteries compared to last year’s iPhone 16 lineup. Here’s everything we know so far.
iPhone 17 Series Battery Capacities
Caption – Apple iPhone 17 Series Battery Capacities Revealed. (Image credit – ShrimpApplePro on X)
Apple will unveil four models this year, which will include the iPhone 17, iPhone 17 Air, iPhone 17 Pro, and iPhone 17 Pro Max. Here are the battery details of each model as per the leaked China’s regulatory listings –
- iPhone 17 (model number ‘PSMT4’) – 3692mAh
- iPhone 17 Pro (model numbers ‘S2225’ and ‘2226A’) – 3988mAh / 4252mAh
- iPhone 17 Pro Max (model numbers ‘PSMU8’/’NA295’ and ‘PSMY9’/’NA293’) – 4823mAh / 5088mAh
- iPhone 17 Air (model numbers ‘S2228’ and ‘108CS’/’2228A’) – 3036mAh / 3149mAh
Replacing the Plus model, Apple is introducing the slim iPhone 17 Air, which has been spotted with two rated capacities.
The information was first shared by reliable leaker ShrimpApplePro shared what they claim are the “real” battery capacities for all four models.
Caption – Tipster ShrimpApplePro’s post on X.
iPhone 17 Series – Design and Battery Optimisations
For the redesigned iPhone 17 Air, 17 Pro, and 17 Pro Max, Apple is reportedly using the additional space inside the chassis more efficiently. If you own an eSIM-only iPhone, you can expect around 5% more capacity compared to versions with a physical SIM card tray.
Interestingly, the standard iPhone 17 is the only model with a single listed capacity, suggesting it may not get the same eSIM-only battery boost, likely because it follows the same design language as the iPhone 16.
Despite that, the overall improvements across the lineup and particularly in the iPhone 17 Pro look like meaningful gains. The iPhone 17 Air’s reported 3149mAh capacity is also higher than earlier leaks suggested.
eSIM-Only Advantage
Apple has been selling eSIM-only iPhones in select regions for three years, but until now, the extra internal space left by the SIM tray was filled with a rubber block. This year, Apple is finally putting that room to good use.
Here’s how much additional capacity eSIM-only models will get compared to physical SIM versions –
- iPhone 17 Air – +3.7%
- iPhone 17 Pro – +6.6%
- iPhone 17 Pro Max – +5.5%
Since Apple is expanding eSIM-only models to more regions this year, it makes sense that the company is optimising that space.
iPhone 17 Series – First Look at Apple’s Crossbody Strap
Caption – The Crossbody Strap for iPhone 17. (Image credit – @SonnyDickson on X)
Alongside the battery leak, popular X tipster Sonny Dickson has shared images of Apple’s upcoming crossbody strap accessory for the iPhone 17 lineup. The leaked images show the strap in a vibrant orange colour.
Here’s your first look at the Crossbody Strap for iPhone 17, do people actually use these? pic.twitter.com/jcJOuleRbq
— Sonny Dickson (@SonnyDickson) September 8, 2025
Caption – Box for Apple’s new “TechWoven” case. (Image credit – Majin Bu)
The design aligns with an earlier leak by Bajin Bu, who shared “1:1 clones” of Apple’s new TechWoven case packaging. The box illustration highlighted two lanyard holes meant for attaching a strap, and the loops visible in Dickson’s leak confirm that design.
iPhone 17 Pro Carrier Leak Hints At 8x Camera Zoom, Vapor Chamber Cooling
In a related leak spree, a purported document from a South Korean carrier has surfaced, shedding light on more specs for the upcoming iPhone 17 lineup.
We’ve already heard rumours that the iPhone 17 Pro and Pro Max will get upgraded telephoto camera systems, and this document claims the zoom level will actually jump to 8x, compared to the 5x zoom found on the iPhone 16 Pro models. Alongside this, Apple is also expected to bring a dramatically improved cooling system to its Pro models.
Caption – iPhone 17 Pro leaked render.
According to the carrier documentation, both the iPhone 17 Pro and Pro Max will incorporate a new vapor chamber cooling system. While this technology has been used in premium Android smartphones for years, it would mark a first for iPhones. The system works by dispersing heat away from the CPU and GPU, allowing the chip to sustain peak performance for longer before hitting thermal limits and throttling down.
For Apple’s Pro devices, this could translate into longer 3D gaming sessions with stable frame rates, extended ProRes video recording outdoors, and smoother performance in other resource-heavy tasks. The document even references support for 8K video recording, which would naturally benefit from this improved thermal efficiency.
The leak was first shared in a now-deleted post by Jukan on X. However, it remains unclear if the specifications are based on official data. Historically, carriers have sometimes created advance documentation by pulling together details from consensus leaks and rumours.
Adding to this, Bloomberg has previously reported that the iPhone 17 Pro could feature a variable aperture system, where the optical zoom distance adjusts mechanically. If true, this would mark a major departure from all earlier iPhones, which have always used fixed zoom distances.
Apple Event on September 9
The final reveal is just hours away. Apple will announce the iPhone 17 lineup and new accessories during its September 9 event, which begins at 10:00 AM PT / 1:00 PM ET. The keynote will stream live on Apple’s website, YouTube, and the Apple TV app.
FAQs
Q1. What are the battery capacities of the iPhone 17 models?
Answer. According to a regulatory leak, the iPhone 17 lineup will feature larger batteries – iPhone 17: 3692mAh, iPhone 17 Air: up to 3149mAh, iPhone 17 Pro: up to 4252mAh, iPhone 17 Pro Max: up to 5088mAh.
Q2. How does the eSIM-only design affect battery capacity in the iPhone 17 Series?
Answer. Apple is using the extra space from removing the SIM tray to boost battery capacity in eSIM-only models, up to 6.6% more in the Pro and 5.5% more in the Pro Max.
Q3. What is the new crossbody strap accessory for iPhone 17?
Answer. Leaked images show a vibrant orange crossbody strap designed for Apple’s new TechWoven case, featuring dual lanyard loops for hands-free carrying.