Rumored iPhone 18 Pro Max specs point to Apple’s heaviest iPhone in years

A new rumor published on Weibo suggests that the iPhone 18 Pro Max could be the heaviest iPhone in years. Here are the details.

Bigger battery, heavier body

Earlier this month, Macworld reported that the iPhone 18 Pro Max’s battery capacity would reach 5,425 mAh on the eSIM model and 5,235 mAh on the version with a physical SIM tray. A few days later, regulatory filings pointed to slightly different figures: 5,567 mAh for the US/eSIM-only model and 5,391 mAh for the China model with a physical SIM tray.

For reference, the iPhone 17 Pro Max’s battery has a reported capacity of 5,088 mAh on eSIM-only models and 4,823 mAh on the China model with a physical SIM tray. In practice, that means the rumored iPhone 18 Pro Max figures would represent a sizable jump either way.

Now, Weibo leaker Ice Universe (via MacRumors) has shared an extra piece of information on what to expect from the iPhone 18 Pro Max’s tech specs: its weight, given the large battery.

From their post on Weibo (translation ours):

“The iPhone 18 Pro Max’s 5,500mAh battery comes at the cost of a 240g body and a 9mm-thick chassis.”

At 240g, the iPhone 18 Pro Max would be Apple’s heaviest iPhone in years, matching the iPhone 13 Pro Max and iPhone 14 Pro Max, which also weighed 240g.

Since then, Apple has kept its largest iPhone models below that mark, with the iPhone 15 Pro Max weighing 221g, the iPhone 16 Pro Max weighing 227g, and the iPhone 17 Pro Max weighing 233g.

Apple’s material changes also help explain the Pro Max’s recent weight swings. The iPhone 13 Pro Max and iPhone 14 Pro Max used stainless steel, the iPhone 15 Pro Max and iPhone 16 Pro Max moved to titanium, and last year’s iPhone 17 Pro Max switched to aluminum.

Current rumors suggest Apple will stick with aluminum for the iPhone 18 Pro Max, making the reported weight increase more likely to come from internal changes, including the larger battery and thicker design.

Do you think the added weight to the iPhone 18 Pro Max will be too noticeable? Let us know in the comments.

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