Last-minute leak reveals iPhone 17 batteries, eSIM variants get up to 7% more battery

By Mehtab Ansari • Updated On 8 Sept 2025

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TL; DR

The iPhone 17 Air packs a 3,036 mAh battery, or 3,149 mAh on the eSIM-only model.
The iPhone 17 Pro Max finally crosses 5,000 mAh with its eSIM version.
eSIM-only models gain up to 9% extra capacity by dropping the SIM tray.

A last-minute leak has revealed the full battery capacities for Apple’s upcoming iPhone 17 lineup, ahead of the official launch. The information surfaced through Chinese regulatory filings and was shared online by ShrimpApplePro.

iPhone 17, 17 Air, 17 Pro, and 17 Pro Max Battery Capacities

The biggest highlight is the iPhone 17 Air, Apple’s ultra-slim model, which manages to fit a 3,036 mAh battery in its SIM version and a slightly larger 3,149 mAh unit in the eSIM-only version. This puts to rest earlier rumors of a sub-3,000 mAh battery, showing Apple has managed to balance thin design with usable endurance.

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The standard iPhone 17 also sees a modest bump to 3,692 mAh compared to last year’s 3,561 mAh.

On the higher end, the iPhone 17 Pro is listed with 3,988 mAh for the SIM model and 4,252 mAh for the eSIM version, an increase of up to 18 percent over the iPhone 16 Pro.

The biggest upgrade arrives with the iPhone 17 Pro Max, which now carries 4,823 mAh on the SIM version and an impressive 5,088 mAh on eSIM.

	eSIM Version	SIM Version
iPhone 17	–	3,692 mAh
iPhone 17 Air	3,149 mAh	3,036 mAh
iPhone 17 Pro	4,252 mAh	3,988 mAh
iPhone 17 Pro Max	5,088 mAh	4,823 mAh

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This marks the first time an iPhone has crossed the 5,000 mAh mark. It’s also good to see Apple using the freed-up SIM slot space to add additional battery capacity on the iPhones.

Apple’s Awe Dropping keynote is set for tomorrow, September 9 at 10:30 pm IST or 10 am PDT, where they’ll reveal all these iPhones officially. Let me know your thoughts on the battery capacities in the comments section below.

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Mehtab Ansari

Mehtab Ansari is the Assistant Editor – Features & Reviews at Smartprix, where he writes about smartphones, laptops, audio gear, and everything in between. A computer science student by degree but a tech nerd by heart, he’s been into consumer tech for years and started reviewing products professionally in February 2024. He’s especially into photography and audio, often spending more time testing a smartphone’s camera than he probably should. For him, tech isn’t just work, it’s what he’s always thinking about.

Expertise

Smartphones, laptops, tablets, monitors, smartwatches, photography, and audio gear. I’ve reviewed over 60 products across these categories on Smartprix in the past year and a half.

Education - Bachelor of Computer Applications – Nizam College, Hyderabad (2022–2025) | Joined Smartprix -February 2024 | Published Reviews & Stories - 723

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