Apple has introduced several meaningful changes in this year’s iPhone 15 and iPhone 15 Plus models like the A16 Bionic chip, Dynamic Island, 48MP Main camera with up to 2x Telephoto, and USB-C port.
In addition, the new 6.1-inch base models also feature slightly larger batteries than their predecessor iPhone 14 and iPhone 14 Plus models to deliver longer battery life.
However, it appears that the new iPhone 15 Plus delivers longer battery life not only than the iPhone 14 Plus but also than the iPhone 15 Pro Max.
Battery specs of iPhone 15, iPhone 15 Plus, iPhone 15 Pro and iPhone 15 Pro Max
| Model | Battery size |
| iPhone 15 | 3,349 mAh |
| iPhone 14 | 3,279 mAh |
| iPhone 15 Plus | 4,383 mAh |
| iPhone 14 Plus | 4,325 mAh |
| iPhone 15 Pro | 3,274 mAh |
| iPhone 14 Pro | 3,200 mAh |
| iPhone 15 Pro Max | 4,422 mAh |
| iPhone 14 Pro Max | 4,323 mAh |
The highest-end iPhone 15 Pro features the largest battery in the new iPhone 15 series, and surprisingly, the iPhone 15 Plus features the second largest battery in the series, not the iPhone 15 Pro. Differences in battery sizes impact the battery life performance of each model.
iPhone 15 Plus gives the longest battery life while the iPhone 15 Pro gives the lowest
Tom’s Guide and YouTuber @Mrwhosetheboss tested the battery life of each iPhone 15 model to see which one delivers the longest battery life.
@Mrwhosetheboss battery test involved social media, audio and video streaming, camera usage, ChatGPT, and other workflows, and Tom’s Guide‘s test involved continuous web surfing.
Interestingly, the results of two different types of testing drew the same conclusion; The iPhone 15 Plus took the crown with the longest battery life while the iPhone 15 Pro Max came second. The iPhone 15 Pro delivered the lowest battery life in the series.
| Models | Battery test (Mrwhosetheboss) | Battery test (Tom’s Guide) |
| iPhone 15 Plus | 13 hrs 19 mins | 14 hrs 14 mins |
| iPhone 15 Pro Max | 11 hrs 41 mins | 14 hrs 02 mins |
| iPhone 15 | 9 hrs 57 mins | 11 hrs 05 mins |
| iPhone 15 Pro | 9 hrs 20 mins | 10 hrs 53 mins |
iPhone 15 series battery against older iPhone 14 Pro and iPhone 13 Pro models
When tested against older iPhone 14 and iPhone 13 models, the battery life results were similar.
| Models | Battery (Mrwhosetheboss) | Battery test (Tom’s Guide) |
| iPhone 15 Plus | 13 hours 19 minutes | 14 hrs 14 mins |
| iPhone 15 Pro Max | 11 hours 41 minutes | 14 hrs 02 mins |
| iPhone 13 Pro Max | 11 hours 19 minutes | *Not tested |
| iPhone 14 Pro Max | 10 hours 54 minutes | 13 hrs 39 mins |
| iPhone 15 | 9 hours 57 minutes | 11 hrs 05 mins |
| iPhone 15 Pro | 9 hours 20 minutes | 10 hrs 53 mins |
| iPhone 14 | 9 hours 2 minutes | 9 hrs 28 mins |
Without a doubt, all of the iPhone 15 models deliver better battery life than their predecessors and even a few older Pro models because of advanced processors and larger batteries.
Within the latest series, users should opt for the iPhone 15 Plus or 15 Pro Max if they prioritize battery life. iPhone 15 Plus costs $100 more than iPhone 15, maybe Apple is incentivizing consumers to opt for the 6.7-inch base model with a larger display and best battery life.
When we did a reviews roundup of the iPhone 15 and iPhone 15 Plus, we predicted that the 15 Plus would be the base model this year for the reasons mentioned above.
