Short answer
The Pro Max, yes — Apple calls it its biggest battery-life increase ever. The 6.3-inch Pro is improved but not transformed.
Battery life is the number-one reason people upgrade. Here's what to realistically expect.
Apple's ratings
| Model | Video playback |
|---|---|
| iPhone 18 Pro | Up to 36 hours |
| iPhone 18 Pro Max | Up to 45 hours |
In real life
Video playback ratings are lab tests. Real-world screen-on time depends on brightness, signal, heat and apps. As a rule of thumb, a recent Pro Max with a healthy battery can manage 9–12 hours of mixed screen-on time. See our screen-on time guide for more.
Coming from an older iPhone?
If you have iPhone 15 Pro or older with a worn battery, either iPhone 18 Pro model will feel like a huge jump.
Sources
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