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ccording to a new leak doing the rounds, the iPhone 18 Pro Max will actually ship in two battery flavors, not one. The eSIM-only version — the one sold in markets like the US that ditched the physical SIM tray is tipped to pack a 5,425 mAh cell.
The version that keeps a physical SIM slot comes in a little smaller at 5,235 mAh.
Neither number is small talk. Compare that to the iPhone 17 Pro Max, where the eSIM model sits at 5,088 mAh and the SIM-slot version at 4,823 mAh. That's a jump of roughly 337 mAh and 412 mAh respectively a genuinely large bump by iPhone standards, where battery increases usually creep up in double digits, not triple
Here's the part that'll raise eyebrows: if this leak holds up, the iPhone 18 Pro Max's smaller variant would still edge out the Samsung Galaxy S26 Ultra's 5,000 mAh battery.
That's not a typo "Apple potentially out-batterying Samsung's own Ultra flagship". Worth remembering, though, that leaks this specific always come with an asterisk. Nothing's confirmed until Apple says so in September.
A bigger battery is only half the battery-life story, and this year Apple seems to be attacking it from multiple angles at once.
The A20 Pro chip — expected to be Apple's first built on a 2-nanometer process is rumored to bring close to 30% better power efficiency over the current A19 Pro, on top of a performance bump. Pair that with Apple's next-gen C2 modem, which is reportedly replacing Qualcomm hardware in the Pro lineup, and the efficiency gains could end up mattering more than the raw mAh figure.
- Camera: A mechanical variable aperture main camera is rumored for the first time on any iPhone, alongside an upgraded 24MP selfie camera.
- Design: A smaller Dynamic Island is expected, made possible by shifting some Face ID components under the display.
- Colors: Cosmic Orange seems to be replaced with Dark Cherry, which now joins Silver, Light Blue, and a returning Black option.
- Release: Apple is reportedly splitting its lineup this cycle. Pro models (plus a first-ever foldable iPhone) land in September 2026.
- Price: With RAM and chip costs climbing, some analysts expect the Pro Max to cost more than last year's model.
Photo: @AI-generated / The Indian Post Live
Battery (eSIM): iPhone 18 Pro Max – 5,425mAh | iPhone 17 Pro Max – 5,088mAh | Galaxy S26 Ultra – 5,000mAh
Battery (SIM Slot): iPhone 18 Pro Max – 5,235mAh | iPhone 17 Pro Max – 4,823mAh | Galaxy S26 Ultra – 5,000mAh
Battery Increase: iPhone 18 Pro Max – +337 / +412mAh | iPhone 17 Pro Max – — | Galaxy S26 Ultra – —
Biggest Apple Battery: iPhone 18 Pro Max – Yes (Leaked) | iPhone 17 Pro Max – No | Galaxy S26 Ultra – —
Bigger than Samsung: iPhone 18 Pro Max – Yes (Leaked) | iPhone 17 Pro Max – No | Galaxy S26 Ultra – 5,000mAh
Processor: iPhone 18 Pro Max – A20 Pro (2nm) | iPhone 17 Pro Max – A19 Pro | Galaxy S26 Ultra – Snapdragon/Exynos
Efficiency: iPhone 18 Pro Max – ~30% Better | iPhone 17 Pro Max – Current Gen | Galaxy S26 Ultra – Different Architecture
Modem: iPhone 18 Pro Max – Apple C2 | iPhone 17 Pro Max – C1/Qualcomm | Galaxy S26 Ultra – Qualcomm
Battery Life: iPhone 18 Pro Max – Expected Better | iPhone 17 Pro Max – Excellent | Galaxy S26 Ultra – Excellent
Main Camera: iPhone 18 Pro Max – Variable Aperture | iPhone 17 Pro Max – Fixed Aperture | Galaxy S26 Ultra – Variable Features
Selfie Camera: iPhone 18 Pro Max – 24MP | iPhone 17 Pro Max – 12MP | Galaxy S26 Ultra – ~12MP
Dynamic Island: iPhone 18 Pro Max – Smaller | iPhone 17 Pro Max – Current Size | Galaxy S26 Ultra – Not Applicable
Face ID: iPhone 18 Pro Max – Under-Display Elements | iPhone 17 Pro Max – Standard Face ID | Galaxy S26 Ultra – Face Unlock + Fingerprint
Colors: iPhone 18 Pro Max – Dark Cherry | iPhone 17 Pro Max – Cosmic Orange | Galaxy S26 Ultra – Samsung Colors
AI Features: iPhone 18 Pro Max – New Apple Intelligence | iPhone 17 Pro Max – Apple Intelligence | Galaxy S26 Ultra – Galaxy AI
Launch: iPhone 18 Pro Max – Sep 2026 | iPhone 17 Pro Max – Sep 2025 | Galaxy S26 Ultra – 2026
Foldable Version: iPhone 18 Pro Max – Expected | iPhone 17 Pro Max – No | Galaxy S26 Ultra – Already Available
Price: iPhone 18 Pro Max – Likely Higher | iPhone 17 Pro Max – Current Pricing | Galaxy S26 Ultra – Premium Pricing
Main Focus: iPhone 18 Pro Max – Battery + AI | iPhone 17 Pro Max – Performance | Galaxy S26 Ultra – AI + Camera
Best For: iPhone 18 Pro Max – Apple Power Users | iPhone 17 Pro Max – Existing iPhone Users | Galaxy S26 Ultra – Android Power Users
Apple is set to launch the iPhone 18 soon, and one of its most talked-about features is the battery; the iPhone 18 Pro Max is expected to come with a significantly larger battery. Apple is doing this for reasons such as the integration of AI, the need to compete with rivals, and the use of silicon-carbon anode technology.
Apple is now integrating AI features into its mobile phones to run in the background, which places a heavier load on the CPU and GPU. This causes the battery to drain very rapidly, making a larger battery essential to handle the high power consumption.
Android has seen significant improvements recently, enabling Samsung phones to perform well in the market. Consequently, Apple needs to do something different to stay competitive—especially since brands like Samsung, OnePlus, and Xiaomi are now offering large batteries ranging from 5,500 mAh to 6,000 mAh. While Apple previously relied solely on software optimization, this time it has had to increase the actual physical size of the battery.
A large battery usually implies a thick or heavy mobile phone, but Apple is employing new technologies that allow for greater power capacity within a smaller footprint. This enables the phone to retain a slim design while significantly boosting battery life.
