Apple recently announced that it was intentionally slowing down older iPhone models in order to preserve battery life. This had been a long-standing conspiracy theory floating around the internet.
The first step for using this process involved a bit of intentional waiting for my iPhone's battery capacity to degrade under 80% of its maximum capacity. That's because to qualify as a repair ...
Apple offers in-store battery replacement for $99 for the newest iPhone 15 models, which drops down to a minimum of $69 for the oldest iPhone SE and iPhone 5 models the company still supports.