Apple never reveals the battery capacities of its phones, but thanks to teardowns we know that the iPhone 14 Pro has a 3,200mAh battery, and the iPhone 15 is believed to have a slightly larger 3,349mAh one.

You might think that would lead to better battery life for the iPhone 15, but in fact according to Apple the iPhone 14 Pro lasts longer in most cases, being able to last through up to 23 hours of video playback on a single charge, compared to 20 hours with the iPhone 15.