Battery Life and Charging Performance
According to testing by CNET, the iPhone 18 Pro Max delivers the longest overall battery life of any iPhone to date. This improvement is attributed to a larger battery capacity, the power-efficient A20 Pro chip, and iOS 27, which includes behind-the-scenes optimizations to reduce power consumption. The iPhone 18 Pro was identified as the fastest-charging iPhone in Apple’s lineup.
In CNET’s 30-minute wired charging test, the iPhone 18 Pro reached 53% battery in 15 minutes and 82% in 30 minutes. This represents an 8% gain over the iPhone 17 Pro, which reached 74% in the same timeframe. The improvement is linked to the 18 Pro’s support for 60-watt fast charging, compared to the 40-watt support on the previous model. The iPhone 18 Pro Max added 77% in the 30-minute test, hitting 48% at the 15-minute mark.
In a 3-hour video streaming test, the iPhone 18 Pro retained the highest remaining charge, losing 8% less than the iPhone 17 Pro. However, in a 45-minute battery stress test involving gaming and multitasking, the 2024 iPhone 16 Plus held the best score, edging out the 18 Pro Max by 1 percentage point. The iPhone 18 Pro placed last in this specific stress test, though CNET noted its result was still better than many Android competitors, such as the Pixel 11 Pro and Galaxy S26.