The iPhone 18 Pro Max battery capacity exposed by Chinese certification documents is larger than previously rumored figures. (Photo/Reuters)
It has been previously reported that the battery capacity of Apple’s new generation iPhone 18 Pro Max will reach a new high, possibly reaching a maximum of 5,425mAh. However, the latest exposure of Chinese certification documents shows that the actual capacity may be larger than the rumored figure.
It is understood that the battery capacity information previously circulated on the Internet was suspected to come from information leaked after India’s Tata Electronics was hacked by hackers. However, what was exposed this time was China’s official certification document, so the overall credibility is considered higher.
According to the certification documents, the battery capacity of the SIM card version of the iPhone 18 Pro Max is 5,391mAh, and the pure eSIM version is as high as 5,567mAh; as for the iPhone 18 Pro, there is only a slight upgrade.
Chinese certification documents reveal iPhone 18 Pro series battery capacity
iPhone 17 Pro Max → iPhone 18 Pro Max
● SIM card version: 4,823mAh → 5,391mAh (approximately 11.8% increase)
● Pure eSIM version: 5,088mAh → 5,567mAh (approximately 9.4% increase)
iPhone 17 Pro → iPhone 18 Pro
● SIM card version: 3,988mAh → 4,056mAh (approximately 1.7% increase)
● Pure eSIM version: 4,252mAh → 4,288mAh (approximately 0.8% increase)
Battery life is expected to be comparable to 7,000mAh Android flagships
On the other hand, well-known tipster Ice Universe is also very optimistic about the battery life performance of iPhone 18 Pro Max. He believes that with the support of the new A20 Pro chip, more complete iOS 27 optimization, and new heat dissipation design, even if the battery capacity is not as good as some Android flagships, the actual battery life is expected to exceed many Android phones equipped with 7,000mAh batteries.
In fact, the larger the battery capacity, the longer the battery life. According to a battery life test conducted by foreign media CNET earlier this year on 35 mobile phones launched in 2025, although the iPhone 17 Pro Max is not the model with the largest battery capacity, it still won the battery life championship, beating many Android flagships equipped with larger batteries. Display chip performance and system optimization are also key factors affecting battery life performance.
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