Introduction

As Apple gears up for a series of groundbreaking releases, including its first foldable iPhone and a new CEO, the tech giant is also set to unveil the iPhone 18 series in early 2027. Excitement is building around significant battery upgrades across multiple models, promising enhanced performance and longevity. Here’s a comprehensive look at everything we know about the battery capacities of the upcoming iPhone 18 models.

iPhone 18 Ultra

Apple's first foldable phone, the iPhone 18 Ultra, will feature a dual-cell battery design, allowing for greater capacity thanks to the innovative layout. Rumors suggest that this device could come equipped with the largest battery ever seen in an iPhone, with estimates ranging between 5,400 and 5,800 mAh. This robust battery capacity places the iPhone Ultra among the leading foldable devices, surpassing competitors like the Galaxy Z Fold 7 and Google Pixel 10 Pro Fold, while potentially only trailing behind the Motorola Razr Fold with its 6,000 mAh battery.

The upcoming Apple A20 Pro chip, built on a 2nm process, is expected to enhance efficiency significantly, contributing to extended battery life. Additionally, the Apple C2 modem will further improve energy management within the device.

iPhone 18 Pro Max

The iPhone 18 Pro Max is rumored to have a battery capacity of 5,100 to 5,200 mAh, a slight increase from the previous model's 5,088 mAh battery. This model may offer excellent battery life, especially in its eSIM-only version for the US market. The variance in battery size will be due to additional internal space available for the eSIM model.

iPhone 18 Pro

In line with rumors, the iPhone 18 Pro is expected to feature a battery slightly larger than its predecessor, the iPhone 17 Pro. The anticipated specifications include a 4,056 mAh battery for models with a physical SIM card and 4,288 mAh for eSIM-only versions. This modest enhancement wins favor for the latter due to space constraints related to physical SIM slots.

iPhone 18

Details about the iPhone 18 remain sparse due to its release being pushed to early 2027. However, it is safe to speculate that its battery will be similar or slightly larger than the iPhone 17’s 3,692 mAh capacity, perhaps in the 3,750-3,800 mAh range. While this wouldn't dramatically enhance battery life, it represents a positive step forward.

As the launch date approaches, further rumors and leaks are likely to surface, giving more insights into the iPhone 18’s features and specifications.