iPhone battery life is dependent on the model you have and the ways in which you use it. Models in the iPhone 13 range can retain charge for more than a day, with video playback of up to 28 hours on the iPhone 13 Pro Max. On the iPhone 13 and iPhone 13 Pro, you’ll get up to 19 and 22 hours of video playback respectively. To learn more about battery life, check out the specifications tab on the page of a specific iPhone model.