Apple could give the iPhone 18 Pro Max a massive battery upgrade this year. If accurate, that would give the iPhone 18 Pro Max a nearly 12% larger battery than the iPhone 17 Pro Max. Apple may supersize the iPhone 18 Pro Max batteryApple made the iPhone 17 Pro family thicker and heavier to accommodate larger batteries. That worked, with the iPhone 17 Pro Max packing the largest battery ever in an iPhone and offering unrivaled battery life. Model eSIM model Physical SIM model iPhone 18 Pro 4,288mAh 4,056mAh iPhone 17 Pro 4,252mAh 3,988mAh Increase 36mAh (~1%) 68mAh (~2%) iPhone 18 Pro Max 5,567mAh 5,391mAh iPhone 17 Pro Max 5,088mAh 4,823mAh Increase 479mAh (~9%) 568mAh (~12%)Bigger battery, bigger iPhone 18 Pro Max?