iPhone 18 Pro Max Review: Battery Life and Key Changes

The iPhone 18 Pro Max extends battery life by 14 hours over its predecessor and introduces a 2nm A20 Pro chip, according to a review. The device enters the Brazilian market with a starting price of R$ 12,999 for the 256 GB model, reaching R$ 21,999 for the 2 TB version.

A20 Pro chip and 12 GB RAM drive performance

The internal hardware centers on the A20 Pro chip built on a 2nm process, paired with 12 GB of RAM and an expanded cooling system. In AnTuTu benchmarks, the device scored 3.5 million points, showing speeds that surpass previous generations. The hardware maintains fluid performance in gaming even with high graphics settings.

The display is a 6.9-inch OLED panel featuring a variable refresh rate up to 120 Hz, HDR10, and Dolby Vision. Testing showed an automatic brightness peak of 2,200 nits. Apple reduced the Dynamic Island size by 35% to increase the usable screen area.

iPhone 18 Pro Max – More Powerful and Better Battery This Time!

Pro Tip: Users can identify how often they use the dedicated telephoto lens by using a “Smart Album” filter in the Photos app with the 16.891mm lens parameter, a method shared by Stephen Robles.

Battery life exceeds iPhone 17 Pro and Galaxy S26 Ultra

A 5,391 mAh battery provided 45 hours of use in moderate testing. Charging is handled via a 54W wired connection, taking one hour and eight minutes for a full charge, and a 25W MagSafe wireless option. The charger is not included in the box.

Canaltech conducted a specific stress test involving four hours of 4K video playback at maximum brightness. The results show the iPhone 18 Pro series is more efficient than previous models and competitors:

iPhone 18 Pro Max Review: Battery Life and Key Changes
Photo: Canaltech
Device Battery Capacity Battery Drop (4h 4K Video)
iPhone 18 Pro 4,056 mAh 15%
iPhone 17 Pro 3,988 mAh 20%
Galaxy S26 Ultra Not specified 20%

Canaltech editor Léo Müller reported that the iPhone 18 Pro lasted two days on a single charge in specific daily use scenarios.

Pro Max telephoto lens outperforms iPhone Duo zoom

The camera system features a main lens with a variable aperture of f/1.48. While it is noted that the variable aperture has little impact on overall quality, a Tom’s Guide comparison by John Velasco from October 27, 2026, found the Pro Max superior in color, dynamic range, and zoom.

The Pro Max uses a dedicated 48 MP telephoto lens with 4x native optical zoom. In 10x zoom tests, Velasco reported that the Pro Max captured finer details and sharper text compared to the iPhone Duo, which relies on digital cropping. All cameras support 4K filming at 60 fps.

Did you know? Despite having an 18 MP front camera compared to the 12 MP lens on the iPhone Duo, Tom’s Guide rated the selfie quality of both devices as a tie.

iPhone 18 Pro Max Review: Battery Life and Key Changes
Photo: Vietnam.vn

iOS 27 and Siri AI integration

The device runs iOS 27, which introduces refinements to “Liquid Glass” and expands widget capabilities. The OS now supports three simultaneous Live Activities. Siri AI provides contextual responses, though these capabilities vary by language.

Choosing between Pro and Pro Max

Reports indicate that the primary distinctions are screen size and battery longevity. The Pro Max is positioned for users who frequently edit content, play games, or watch movies on their device. However, it is noted that processing power is identical between the Pro and Pro Max because they share the same chip and hardware architecture.

iPhone 18 Pro Max Specifications

  • Weight: 249 grams
  • Protection: IP68 rating
  • RAM: 12 GB
  • Battery: 5,391 mAh
  • Charging: 54W wired / 25W MagSafe

Common Questions About the iPhone 18 Pro Max

How does the battery compare to the iPhone 17 Pro?
The iPhone 18 Pro consumed 15% battery during a four-hour 4K video test at max brightness, while the iPhone 17 Pro consumed 20%, according to Canaltech.

IPHONE 18 PRO MAX: maior MUDANÇA aparece LONGE da TOMADA | Análise / Review

What is the zoom capability of the Pro Max?
The device features a 48 MP telephoto lens with a native 4x optical zoom, which provides more detail in 10x shots than digital cropping methods.

What are the starting prices in Brazil?
The 256 GB entry model starts at R$ 12,999, while the 2 TB version reaches R$ 21,999.