A vapor chamber may sound like a disappointing WWE pay-per-view, but it's actually an important addition to the iPhone 17 Pro and iPhone 17 Pro Max. It may even prove one of the most consequential upgrades Apple made to its phones this year.
If you're not familiar with what this is, a vapor chamber is a sealed cavity filled with a network of metal strands and a small amount of fluid, in the iPhone 17 Pro's case, deionized water. When the phone heats up, the water evaporates, moving to the far side of the chamber where it's cooler, taking some heat energy with it. The water then condenses again as it cools, where it then flows to the warmer part again, where the cycle repeats.
