The battery has 15.04Wh at 3.79V, which is calculated to be 3.968mAh, which is a huge increase over the battery of the iPhone XS Max, which has a capacity of 3.174mAh.
Compared to the 3.500mAh Galaxy S9+, the iPhone 11 Pro May’s battery is ten percent more powerful. As it approaches the 4,100mAh battery on the Samsung Galaxy S10+.
This also shows the reasons why the iPhone 11 is heavier than the previous models, as it should also carry a massive battery. Although split in the middle, the RAM capacity of the iPhone Pro Max has not been revealed.