New iPhone 18 Pro battery leak just changed the story for non-US buyers

With Apple's September reveal window drawing closer, prolific Weibo leaker Digital Chat Station has shared what he claims are the iPhone 18 Pro's battery figures, subsequently corroborated by Ice Universe — and while the raw numbers are a modest upgrade from the iPhone 17 Pro (curr. $1,061 for a renewed variant on Amazon), the more interesting story lies in who benefits most.

According to the leak, the iPhone 18 Pro will pack a 4,056 mAh battery in physical SIM variants and 4,288 mAh in eSIM-only models. That's a roughly 68 mAh increase over the iPhone 17 Pro's China model and a 36 mAh bump for eSIM units. All this is incremental on paper, sure, but paired with the A20 Pro chip on TSMC's 2 nm process, real-world improvements are expected to outpace the raw capacity difference. Apple's first 2 nm chip is expected to deliver much better power efficiency, which compounds the battery story beyond just mAh figures.

The bigger development here, however, is the reach of that larger eSIM battery. The iPhone 18 Pro is expected to expand eSIM-only support to European markets for the first time — meaning buyers across the EU who previously received physical SIM variants with the smaller cell will now automatically land on the larger 4,288 mAh configuration. That's a key upgrade for a large market that has been shortchanged on capacity in the past.

We also previously reported that the iPhone 18 lineup might drop physical SIM support altogether globally, which would eventually close the battery gap between regions entirely.

On the Pro Max side, past leaks from Digital Chat Station hinted at a 5,100-5,200 mAh cell for eSIM models and around 5,000 mAh for physical SIM variants — a similar regional split that now appears to be consistent across the entire Pro lineup. Apple has not confirmed any of these figures.