The first place I went to was the technical specifications pages for the three new phones, the 11, 11 Pro, and 11 Pro Max. They all had relative values based on the previous generation. Of course, my next step was to look at those values. Again, they were relative. So I followed the chain until I came to the iPhone 6s and 6s Plus. Tested for battery health and guaranteed to have a minimum battery capacity of 80%. Frequently bought together This item: Apple iPhone 11 Pro Max, 64GB, Space Gray - Unlocked (Renewed) 10 Ways to Increase maximum battery capacity on your iPhone. Lower your screen brightness. Turn off your GPS. Use simple backgrounds. Kill the Bluetooth. Turn off wi-fi when you’re out. Turn off background auto fresh. Turn off Siri. Use low-power mode. 3 days ago · iPhone 14 - 3,279 mAH iPhone 13 Pro Max - 4,352 mAH iPhone 13 Pro - 3,095 mAH iPhone 13 Mini - 2,406 mAH iPhone 13 - 3,227 mAH. The bigger the screen, the more power a phone uses - hence why the Pro Max models have the biggest batteries. As a rough rule, if you divide the battery capacity of the power bank by the capacity of your phone's X0ZDZA.