https://wccftech.com/iphone-13-pro-max-wired-fast-charging-speeds-up-to-27w/

There is always an advantage in upgrading to Apple’s ‘top of the line’ iPhone, which in this case is the iPhone 13 Pro Max. That increased screen real estate, the 120Hz ProMotion display, and other benefits, there are multiple perks of getting the best of what Apple has to offer, including increased wired fast-charging speeds. According to the latest tests, the 6.7-inch iPhone tops at 27W when plugged in using a compatible power brick.

The YouTube channel ChargerLAB was kind enough to conduct wired charging speed tests on the iPhone 13 Pro Max using a 30W power brick. During testing, it was found that Apple’s biggest iPhone can top out at 27W, making it a notable increase over the iPhone 12 Pro Max from last year, which can only support up to 22W using the same 30W power adapter.