Apple's freshly launched iPhone 17 Pro Max is equipped with a USB - C port. Recently, the renowned review platform ChargerLAB carried out real - world tests. The results show that this phone can attain a maximum charging power of roughly 36W. According to official information, when paired with a 40W or higher - wattage adapter, the iPhone 17 Pro Max can reach a 50% charge in just 20 minutes. In real - world testing, when utilizing Apple's official 40W dynamic power adapter, the iPhone 17 Pro Max peaked at around 38W. It maintained a high power output of 35 - 40W for about 10 minutes, reached a 49% charge in 20 minutes, and displayed a full 100% charge on the screen after 83 minutes.