Supports fast charging. Apple iPhone 11. Samsung Galaxy S21 FE 5G. Fast charging technologies, like Qualcomm’s Quick Charge or MediaTek’s Pump Express, are used to reduce the time it takes to charge a device. For example, with Quick Charge 3.0, the battery can be charged to 50% in just 30 minutes. Samsung Galaxy S21 vs Apple iPhone 15 Specs Comparison Apple iPhone 15 Pro Max Add. 11), Samsung One UI iOS (17.x) Battery. Capacity: 4000 mAh 3349 mAh unBJ.