When Apple announced the new iPhone 13s, it was discovered that Apple would be giving all the phones a larger battery. On paper, the iPhone 13 comes with a 3,227mAh battery versus the iPhone 13 Pro which has a 3,100mAh battery. In theory, this should mean that the iPhone 13 would last longer than its Pro sibling, right?
However, it turns out that isn’t the case, and it seems that ProMotion is to thank for that. For those unfamiliar, ProMotion is the name Apple gave to the 120Hz display. You would think that having a faster refresh rate means more battery use, but isn’t the case. This is because Apple’s ProMotion display is actually dynamic, meaning that it will range from 10Hz to 120Hz depending on what’s going on.
This means that when the phone doesn’t necessarily need a fast refresh rate, it can go down to 10Hz which makes it actually more energy efficient. This is evidenced in a battery test by PhoneBuff where they compared the battery life between the iPhone 13 and 13 Pro and found that the 13 Pro actually outlasted the iPhone 13.
The difference in battery life isn’t that much. Both phones managed 16 hours on standby, and 9 hours and 42 minutes for the iPhone 13, and 9 hours and 51 minutes for the iPhone 13 Pro. While the differences aren’t huge, those who are considering the iPhone 13 Pro don’t need to worry about the slight difference in battery size.