It shouldn't be a surprise that the new iPhone 14 series from Apple has a similar shape and overall dimensions to the 2021 series (they differ just by a few millimetres), thus the battery capacities are also essentially the same.
There are slight variations, but probably not enough to noticeably affect battery life. This year, there are now two models with a huge battery: the more affordable iPhone 14 Plus and the more expensive iPhone 14 Pro Max. They have somewhat smaller batteries than the 13 Pro Max battery, although the difference is minuscule.
| Battery | mAh | Wh | Difference |
| iPhone 13 | 3,227mAh | 12.4Wh | +2.18% |
| iPhone 14 | 3,279mAh | 12.7Wh | |
| iPhone 14 Plus | 4,325mAh | 16.7Wh | - |
| iPhone 13 Pro | 3,095mAh | 12.0Wh | +3.43% |
| iPhone 14 Pro | 3,200mAh | 12.4Wh | |
| iPhone 13 Pro Max | 4,352mAh | 16.8Wh | -0.42% |
| iPhone 14 Pro Max | 4,323mAh | 16.7Wh |
