The first part of the iPhone 12 Pro Max confirms a battery with a lower capacity than the iPhone 11 Pro Max

Finally it seems that it is confirmed that the battery capacity of the iPhone 12 Pro Max is 300 mAh lower than the iPhone 11 Pro Max

Apple iPhone 12 and 12 mini battery size leak clears the capacity decrease mystery - PhoneArena

How to Recalibrate Battery on iPhone 11, iPhone 11 Pro, & iPhone 11 Pro Max

First iPhone 12 teardown confirms smaller battery, flaunts the ingenious MagSafe coil - PhoneArena

iPhone 12 Pro - Wikipedia

A teardown confirms that the iPhone 12 Pro Max battery is only 3,687 mAh

Apple iPhone 12 Pro Max Carries a Smaller Battery Than iPhone 11 Pro Max, TENAA Listing Shows - News18

Teardown Video Confirms iPhone 12 and iPhone 12 Pro Use Same 2,815mAh Battery - MacRumors

iPhone 13 Pro & Pro Max review: Perfect with iOS 15.1

Random: Apple's iPhone 13 Pro Max Has A Larger Battery Capacity Than The Nintendo Switch

iPhone 14, 14 Pro owners complain about battery capacity that's already falling off : r/gadgets